Nitrogen is released into the atmosphere when ________

sugar is completely broken down

Which of the following is an example of active transport?

Sodium being reabsorbed in the kidney

Oxygen exchanging between red blood cells and liver cells

Carbon dioxide exchanging between muscle cells and red blood cells

Water moving out of the small intestine

Sodium being reabsorbed in the kidney

JAMB UTME - Biology - 2017 | Green Bridge CBT

Question 1 Report

What is the primary function of cofactors?

To aid in enzyme function

To synthesize enzymes

To inhibit enzymes

To break down old enzymes

Answer Details

Most enzymes do not function optimally, or even at all, unless bound to other non-protein helper molecules called cofactors.

Read lesson note on Cell Structure (WAEC)

Cell Structure

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Question 2 Report

The biome that is characterized with large herbivores, few and scattered fire resistant trees is

savanna

tropical rain forest

montane forest

desert

Answer Details

The biome that is characterized by large herbivores, few and scattered fire-resistant trees is the savanna. Savannas are grasslands with scattered trees. They are found in many parts of the world, including Africa, South America, and Australia. Large herbivores, such as zebras, elephants, and giraffes, roam the savanna and feed on the grass. The few trees that grow in the savanna are often fire-resistant, meaning they can survive fires that occur naturally in the area. The combination of grass and scattered trees makes the savanna a unique and important ecosystem.

Read lesson note on Ecosystem (WAEC)

Ecosystem

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Question 3 Report

Carbon (iv) oxide is added to the atmosphere when ________?

plants build-up organic compounds

plants absorb mineral salts

sugars are completely broken down in animals

there is thunderstorm

Answer Details

Plant build of of organic compounds such as oil, coal and gas is a great source of emission of carbon dioxide into the atmosphere
Human activities such as the burning of oil, coal and gas, as well as deforestation are the primary cause of the increased carbon dioxide concentrations in the atmosphere.
Other source such has respiration by animals, thunderstorm release carbon dioxide in smaller quantities compare to 87% of carbon dioxide emission from plants build-up organic compounds through human activities

Read lesson note on Modes Of Nutrition (WAEC)

Read lesson note on Plant Nutrition (WAEC)

Modes Of Nutrition

Plant Nutrition

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Question 4 Report

The product after the union of the male and female gamete in animals is called

sperm

egg

embryo

zygote

Answer Details

The product after the union of the male and female gamete in animals is called a zygote. A gamete is a specialized reproductive cell, either a sperm in males or an egg in females, that contains half the number of chromosomes as a regular body cell. When a sperm and an egg join together during fertilization, they form a single cell called a zygote, which has the full number of chromosomes and contains all the genetic information necessary to form a new organism. The zygote then divides and grows into an embryo, which will eventually develop into a mature animal.

Read lesson note on Support And Movement (JAMB)

Read lesson note on Co-ordination And Control (JAMB)

Support And Movement

Co-ordination And Control

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Question 5 Report

Which of the following choices correctly describes the composition of the cell membrane?

contains only lipids

contains lipids and protein

contains lipids and cytosol

contains only proteins

Answer Details

The correct choice is "contains lipids and proteins." The cell membrane is the outermost layer of the cell that separates the internal environment of the cell from the external environment. It is composed mainly of two types of molecules: lipids and proteins. The lipids in the cell membrane are primarily phospholipids, which have a hydrophilic (water-loving) head and a hydrophobic (water-fearing) tail. These lipids are arranged in a bilayer, with the hydrophobic tails facing each other and the hydrophilic heads facing outward towards the watery environments on either side of the membrane. The proteins in the cell membrane serve a variety of functions, including transport of molecules across the membrane, cell signaling, and structural support. Some proteins span the entire membrane, while others are only present on one side. The cell membrane also contains small amounts of carbohydrates and other molecules, but lipids and proteins are the two main components.

Read lesson note on Nucleic Acids (WAEC)

Read lesson note on Cell Structure (WAEC)

Nucleic Acids

Cell Structure

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Question 6 Report

The key event in the transition of the amphibians from water to land is the ________

replacement of the gills with lungs

possession of webbed limbs

limbs

possession of tympanic membrane

Answer Details

Amphibians display some interesting and changing characteristics as they metamorphose through various forms on their way to adulthood. The frog, for instance, begins life underwater as a larva with gills and becomes and air-breather with lungs as an adult.
&therefore4; in case of draught, frog can amphibians can use lungs to breathe on land

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Question 7 Report

Use the diagram to answer the question that follows.

The dentition is found in

rat

dog

sheep

man

Answer Details

Read lesson note on Tissues And Supporting Systems: (WAEC)

Tissues And Supporting Systems:

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Question 8 Report

Erythrocytes are known as ________

white blood cell

red blood cells

phagocytes

leucocytes

Answer Details

Erythrocytes are known as red blood cells. They are called red blood cells because they contain a red pigment called hemoglobin which binds to oxygen and gives blood its red color. Erythrocytes are responsible for carrying oxygen from the lungs to the body's tissues and organs, and they also help transport carbon dioxide from the tissues back to the lungs to be exhaled. Unlike white blood cells (leucocytes) and phagocytes, erythrocytes do not play a direct role in the immune system.

Read lesson note on Animal Nutrition (WAEC)

Animal Nutrition

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Question 9 Report

An example of organism which exists as a colony is

Volvox

paramecium

euglena

chlamydomonas

Answer Details

An example of an organism that exists as a colony is Volvox. Volvox is a green alga that forms spherical colonies made up of hundreds to thousands of individual cells. The cells work together to perform functions such as movement and reproduction, giving the appearance of a single organism. However, each cell is still capable of functioning independently. This is an example of colonial organization, where individuals come together to form a larger entity that acts as a single organism.

Read lesson note on Forms In Which Living Cells Exist (WAEC)

Forms In Which Living Cells Exist

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Question 10 Report

The following are example of morphological variation except

size

ability to taste PTC

color

fingerprint

Answer Details

Morphological variation includes aspects of the outward appearance i.e shape, structure, color, pattern, size which is in contrast to physiology variation which deals primarily with function.

Morphological variation arises from a number of factors which can be bluntly classified as either genetic or environmental implanted into the process of evolution.

Read lesson note on Morphological Variations In The Physical Appearance Of Individuals (WAEC)

Morphological Variations In The Physical Appearance Of Individuals

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Question 11 Report

The difference in structure, morphological and behavior of plant and animal is called

adaptation

evolution

variation

succession

Answer Details

Variation, in biology, any difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences (genotypic variation) or by the effect of environmental factors on the expression of the genetic potentials (phenotypic variation).

Variation may be shown in physical appearance, metabolism, fertility, mode of reproduction, behaviour, learning and mental ability, and other obvious or measurable characters.

Read lesson note on Growth (JAMB)

Read lesson note on Heredity (JAMB)

Growth

Heredity

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Question 12 Report

What organelle is the site of photosynthesis in plants?

Chloroplasts

Ribosomes

Cytoplasm

Mitochondria

Answer Details

The organelle that is the site of photosynthesis in plants is called the chloroplast. Chloroplasts are tiny structures that are found in the cells of green plants and algae. They contain a green pigment called chlorophyll, which is responsible for capturing light energy from the sun. This energy is then used to convert carbon dioxide and water into glucose, a type of sugar that plants use as food. During photosynthesis, the chloroplasts use a series of chemical reactions to produce glucose and oxygen as byproducts. This process is crucial for the survival of plants, as it provides them with the energy they need to grow and reproduce. Without chloroplasts, plants would not be able to carry out photosynthesis and would eventually die. This is why chloroplasts are considered one of the most important organelles in plant cells.

Read lesson note on Cell Structure (WAEC)

Cell Structure

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Question 13 Report

The appendicular skeleton is made up of the

limbs

skull and limbs

phalanges

ulna and radius

girdles and limbs

Answer Details

The appendicular skeleton is made up of the girdles and limbs. This means it includes the bones that form the pelvic girdle (the hip bones) and the shoulder girdle (the collarbone and shoulder blade) as well as the bones in the arms and legs. Basically, the appendicular skeleton is everything that is attached to the central part of the skeleton (the axial skeleton) and helps us move our limbs and make our movements more flexible and agile.

Read lesson note on Organization Of Life (WAEC)

Read lesson note on Properties And Functions Of The Living Cell (WAEC)

Organization Of Life

Properties And Functions Of The Living Cell

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Question 14 Report

The feeding relationship among a set of members of a community is referred to as _______?

a food web

pyramid of energy

a food chain

pyramid of member

Answer Details

The feeding relationship among a set of members of a community is referred to as a "food chain." A food chain is a linear sequence of organisms where each member of the sequence is food for the next member. For example, a simple food chain could consist of grass as the producer, a grasshopper as the primary consumer, a bird as the secondary consumer, and a snake as the tertiary consumer. The grass is eaten by the grasshopper, which is then eaten by the bird, which is then eaten by the snake. A food web, on the other hand, is a more complex model that shows the interconnectedness of multiple food chains within an ecosystem. A pyramid of energy is a graphical representation of the amount of energy transferred between trophic levels in a food chain or food web, while a pyramid of members is not a commonly used term in ecology.

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Question 15 Report

Which scenario would cause a covalent bond to form?

Two atoms share electrons so they can fill their outer shells

The constant motion of electrons and the creation of charge imbalances bonds two molecules together

A hydrogen atom with a slight positive charge is attracted to a negative charge of another molecule or atom

One atom loses one or more electrons and the other atom gains one or more electrons

Answer Details

The scenario that would cause a covalent bond to form is when two atoms share electrons so they can fill their outer shells. In a covalent bond, atoms share electrons to achieve a stable electron configuration, which means having a complete outermost energy level. This sharing of electrons allows both atoms to have a full outer shell, making them more stable and less likely to react with other atoms. Covalent bonds are typically formed between non-metal atoms, as they tend to have a greater affinity for electrons and are more likely to share them with other atoms.

Read lesson note on Identification Of Organisms Using Biological Keys (WAEC)

Identification Of Organisms Using Biological Keys

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Question 16 Report

Agglutination is the _______ of the ________

coagulation, white bloodcell

coagulation, water

white blood cells, red blood cell

coagulation, red blood cell

Answer Details

The clumping of cells such as bacteria or red blood cells in the presence of an antibody or complement.

During blood transfusions, the antibodies react with the transfused blood group(if its of different blood group), the erythrocytes clump up and stick together causing them to agglutinate

Read lesson note on Resources To Be Conserved: Soil, Water, Wildlife, Forest And Minerals (WAEC)

Resources To Be Conserved: Soil, Water, Wildlife, Forest And Minerals

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Question 17 Report

Which of the following factors can reduce the population of a community?

Immigration

edaphic

predation

mutualism

Answer Details

Predation can reduce the population of a community. Predation refers to the act of one animal killing and eating another. When predators hunt and eat members of a particular population, it can cause a decrease in the number of individuals in that population. For example, a lion preying on a herd of zebras can reduce the number of zebras in the herd over time. When the number of individuals in a population decreases, it can also have a ripple effect on the entire ecosystem. For example, if the zebras in the above example are a primary food source for other predators, those predators may also experience a decrease in their population due to a lack of food. In conclusion, predation is a natural process that can cause a reduction in the population of a community, and it is an important factor in maintaining balance in the ecosystem.

Read lesson note on Local (Nigerian) Biomes (JAMB)

Read lesson note on Co-ordination And Control (JAMB)

Local (Nigerian) Biomes

Co-ordination And Control

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Question 18 Report

Which of the following is a characteristics of a bacteria except _______?

they can be seen under microscope

they range from 0.5 µ m in diameter

They are grouped accordingly to their cell shape

they do not cause disease

Answer Details

The characteristic of bacteria that does not fit with the others listed is "they do not cause disease." Bacteria are unicellular microorganisms that can be seen under a microscope. They vary in size, but most range from 0.5 µm to 5 µm in diameter. Bacteria can be grouped according to their cell shape, which can be cocci (spherical), bacilli (rod-shaped), or spirilla (spiral-shaped). While some bacteria can cause disease, not all bacteria are harmful. In fact, many types of bacteria are beneficial and essential for human and environmental health. For example, some bacteria help with digestion, while others are used to break down waste materials. Therefore, it is incorrect to assume that all bacteria are disease-causing organisms.

Read lesson note on Physiological Variations (WAEC)

Read lesson note on Spirogyra And Rhizopus (WAEC)

Physiological Variations

Spirogyra And Rhizopus

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Question 19 Report

The level of organization of Amoeba and Euglena cell is ________?

organ

system

cell

tissue

Answer Details

The level of organization of Amoeba and Euglena cells is "cell." Both Amoeba and Euglena are single-celled organisms, meaning that they are made up of only one cell. This single cell contains all the necessary structures and functions needed to carry out the organism's life processes, such as obtaining nutrients, reproducing, and responding to the environment. Therefore, the level of organization for Amoeba and Euglena cells is at the cellular level. They do not have specialized organs or tissues, nor do they have complex systems of organs working together to carry out specific functions, which are characteristics of higher levels of organization found in more complex organisms.

Read lesson note on Forms In Which Living Cells Exist (WAEC)

Read lesson note on Cell Structure (WAEC)

Forms In Which Living Cells Exist

Cell Structure

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Question 20 Report

Gregor Mendel is regarded as the father of ______

variation

genetics

mycology

natural selection

Answer Details

Gregor Mendel is regarded as the father of genetics. Mendel was a monk who conducted experiments with pea plants in the mid-19th century. He discovered that certain traits, such as the color of a pea or the height of a plant, are determined by "factors" that are passed down from parent to offspring. These factors are now known as genes, which are made up of DNA and serve as the basic units of heredity. Mendel's experiments and observations led him to formulate the laws of inheritance, which describe how genes are passed down from generation to generation. His work laid the foundation for modern genetics and helped establish the idea that traits are determined by specific genes. Mendel's discoveries had a profound impact on the scientific community and are now recognized as one of the most important breakthroughs in the history of biology. As a result, he is commonly referred to as the father of genetics.

Read lesson note on Heredity (JAMB)

Heredity

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Question 21 Report

The appendicular skeleton comprises of

pectoral and pelvic girdles

forelimbs, skull and pectoral girdle

lungs and ribs

skull and the vertebral column

Answer Details

The appendicular skeleton includes the bones that make up the arms, legs, and the girdles (shoulder and hip) that attach them to the rest of the body. So, the correct option is "pectoral and pelvic girdles" and "forelimbs". The pectoral girdle is made up of the scapula (shoulder blade) and the clavicle (collarbone). The pelvic girdle is made up of the two hip bones. The forelimbs consist of the humerus (upper arm bone), radius and ulna (lower arm bones), and the bones of the hand (carpals, metacarpals, and phalanges). Together, the bones of the appendicular skeleton help us move around and carry out a wide range of physical activities, from running and jumping to manipulating objects with our hands.

Read lesson note on Tissues And Supporting Systems: (WAEC)

Read lesson note on Cell Structure (WAEC)

Tissues And Supporting Systems:

Cell Structure

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Question 22 Report

Use the diagram below to answer the question that follow:

The diagram represents a

Hygrometer

Wind vane

Anemometer

Rain gauge

Answer Details

It should be Anemometer, which is used to measure the speed of wind

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Question 23 Report

Use the diagram to answer the question that follows:

The structure is adapted for

omnivores

herbivores

canivores

omnivores and canivore

Answer Details

Read lesson note on Nutrition (JAMB)

Read lesson note on Adaptive Colouration (WAEC)

Nutrition

Adaptive Colouration

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Question 24 Report

The level of organism in spirogyra and volvox is

organ

system

cell

Tissue

Answer Details

The level of organization in Spirogyra and Volvox is cell. Spirogyra is a type of green algae that consists of long, thin, spirally coiled filaments. Each filament is made up of many individual cells. Volvox is a type of green algae that forms spherical colonies. The colonies are made up of many individual cells that are organized into a multicellular structure. Both Spirogyra and Volvox are examples of organisms that are made up of individual cells. They do not have tissues or organs, which are structures made up of multiple cells that perform specific functions. They also do not have systems, which are groups of organs that work together to perform a particular function.

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Question 25 Report

Use the diagram to answer the question that follows:

The part labelled I is the ________

carpel

sepal

petal

stamen

Answer Details

Read lesson note on Internal Structure Of A Flowering Plant (JAMB)

Internal Structure Of A Flowering Plant

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Question 26 Report

The protista that is a producer is an aquatic food chain is

trypanosome

paramecium

chamydomonas

amoeba

Answer Details

The protista that is a producer in an aquatic food chain is called "Chlamydomonas". Chlamydomonas is a unicellular organism that belongs to the kingdom Protista and is commonly found in freshwater environments such as ponds and lakes. It is a type of algae that performs photosynthesis, which means that it uses energy from sunlight to produce its own food. In an aquatic food chain, Chlamydomonas plays a vital role as a primary producer. It provides energy and nutrients to other organisms in the food chain, such as small aquatic animals like zooplankton, which in turn are eaten by larger predators like fish. Without Chlamydomonas and other primary producers, the food chain would collapse and the entire ecosystem would be negatively affected.

Read lesson note on Amoeba, Paramecium, And Euglena (WAEC)

Amoeba, Paramecium, And Euglena

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Question 27 Report

In mosses the structure which performs the function of water absorption is the _________?

root hairs

rhizoids

capsule

hyphae

Answer Details

In mosses, the structure that performs the function of water absorption is the rhizoids. Rhizoids are thin, hair-like structures that grow from the lower surface of the moss and penetrate into the soil or substrate. They do not have the specialized tissues that are found in true roots, such as root hairs, but they function in a similar way by absorbing water and minerals from the environment. Rhizoids also help to anchor the moss to its substrate, preventing it from being swept away by wind or water.

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Question 28 Report

Which of the following scenarios is an example of cohesion?

Water molecules stick to the surface of a mirror.

Water sticks to the walls of blood vessels.

Water molecules stay on the tip of a pine needle because the water is attracted to the surface of the needle.

Water molecules stick to one another and form a bead

Answer Details

Cohesion is an ability of water molecule to stick to one another due to the presence of hydrogen bonding

Read lesson note on Properties And Functions Of The Living Cell (WAEC)

Properties And Functions Of The Living Cell

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Question 29 Report

The type of nutrition exhibited when organism lives on the body surface or inside the body of another type of organism is

Holozoic

parasitic

saprohytic

carnivores

Answer Details

The type of nutrition exhibited when an organism lives on the body surface or inside the body of another type of organism is called parasitic nutrition. Parasitic nutrition involves an organism, called a parasite, feeding on or deriving nutrients from another organism, called a host. The parasite benefits from the relationship, but the host is usually harmed or even killed. Parasites can live on the body surface of the host (ectoparasites) or inside the host's body (endoparasites). Examples of parasites include tapeworms, fleas, ticks, and lice. These organisms rely on their hosts for survival and reproduction, and can cause a range of diseases and health problems in the host.

Read lesson note on Animal Nutrition (WAEC)

Read lesson note on Classification (WAEC)

Animal Nutrition

Classification

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Question 30 Report

How does an enzyme affect the rate of a reaction?

It lowers the activation energy of the reaction, increasing the reaction rate.

It raises the activation energy of the reaction, decreasing the reaction rate.

It lowers the activation energy of the reaction, decreasing the reaction rate.

It raises the activation energy of the reaction, increasing the reaction rate.

Answer Details

An enzyme is a protein that acts as a catalyst in biochemical reactions. Enzymes work by lowering the activation energy required for a reaction to occur. Activation energy is the minimum amount of energy needed to start a chemical reaction. By lowering the activation energy, enzymes make it easier for reactant molecules to form the necessary chemical bonds and undergo the reaction, leading to a faster reaction rate. This means that the correct answer is: "It lowers the activation energy of the reaction, increasing the reaction rate."

Read lesson note on Protein Synthesis (WAEC)

Protein Synthesis

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Question 31 Report

The host of liver flake are ______?

pig and snail

pig and sheep

sheep and snail

pig

Answer Details

Liver fluke (Fasciola hepatica) is a parasite affecting a range of livestock and other species. Final hosts in which it can develop to sexual maturity include livestock such as sheep, cattle, horses, pigs, goats, alpacas and deer. People can be infected by eating water cress growing along creeks in fluke-infested country

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Question 32 Report

Red blood cells are also known as _________?

erythrocytes

thrombocytes

phagocytes

leucocytes

Answer Details

Red blood cells are also known as erythrocytes. Erythrocytes are cells in the blood that are responsible for carrying oxygen from the lungs to the rest of the body, and for carrying carbon dioxide from the body to the lungs to be expelled. They are shaped like disks and have a flexible structure, allowing them to move easily through the narrowest blood vessels. They also contain a protein called hemoglobin, which binds to oxygen and gives red blood cells their characteristic red color.

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Question 33 Report

The joint between the femur and tibia is known as ________?

hinge joint

ball-and-socket joint

pivot joint

gliding joint

Answer Details

The knee joint is one of the strongest and most important joints in the human body. It allows the lower leg to move relative to the thigh while supporting the body’s weight.

Movements at the knee joint are essential to many everyday activities, including walking, running, sitting and standing.

The knee, also known as the hinge joint(tibiofemoral joint) formed between three bones: the femur, tibia, and patella.

A gliding joint, also known as a plane joint or planar joint, is a common type ofjoint formed between bones that meet at flat or nearly flat articular surfaces.

Pivot joint, also called rotary joint is a freely moveable joint that allows only rotary movement around a single axis. Pivot joints also provide for the twisting movement of the bones of the forearm (radius and ulna) against the upper arm.

The ball and socket joint (or spheroidal joint) is a type of synovial joint which enables the bone to move in many places (nearly all directions). These are found in the hip.

Read lesson note on Irritability As A Basic Characteristic Of Protoplasm (WAEC)

Irritability As A Basic Characteristic Of Protoplasm

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Question 34 Report

The most efficient respiratory structure used by free living protozoan is ________

body surface

gills

buccal cavity

spiracle

Answer Details

The most efficient respiratory structure used by free-living protozoa is the body surface. Protozoa are single-celled organisms that are found in a variety of habitats, including freshwater, marine environments, and soil. They need to take in oxygen in order to survive, just like multicellular organisms. The body surface of a protozoan is covered in tiny, hair-like projections called cilia, which create a current of water over the surface of the cell. This current helps to bring oxygen-rich water into contact with the protozoan's body, allowing it to diffuse across the cell membrane and into the cell where it can be used for respiration. This method of respiration is efficient because it takes advantage of the large surface area of the protozoan's body, which allows for a large amount of oxygen to be absorbed. Additionally, the constant movement of the cilia helps to maintain a constant flow of oxygen-rich water over the surface of the cell, ensuring that the protozoan has a continuous supply of oxygen.

Read lesson note on Cell Structure (WAEC)

Cell Structure

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Question 35 Report

Ability to taste PTC in some individuals is a character that is

acquired

heritable

sex-linked

morphological

Answer Details

The ability to taste PTC (phenylthiocarbamide) is a heritable character, which means it is determined by your genes that you inherit from your parents. This means that if your parents have the ability to taste PTC, you are more likely to have that ability as well. The ability to taste PTC is caused by a specific gene called the TAS2R38 gene, which codes for a taste receptor that can detect the presence of PTC. Some people have a version of this gene that allows them to taste PTC, while others have a different version that does not. Therefore, whether or not you can taste PTC is determined by your genetic makeup, rather than by any acquired or morphological factors.

Read lesson note on Heredity (JAMB)

Heredity

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Question 36 Report

The modification in structure, physiology and behaviour of plant and animal is called ______

adaption

evolution

variation

succession

Answer Details

The modification in structure, physiology and behaviour of plant and animal is called adaptation. Adaptation refers to the changes that occur in living organisms in response to the challenges presented by their environment. These changes can be physical, such as the development of longer legs or sharper claws, or behavioral, such as the development of new hunting strategies or social behaviors. Adaptations can occur over short periods of time, such as within the lifetime of an individual organism, or over longer periods of time, such as across multiple generations. The process of adaptation allows organisms to survive and thrive in their environments, and is a key mechanism of evolution, the process by which species change over time.

Read lesson note on Structural Adaptation For Survival (WAEC)

Read lesson note on Variation In Population (JAMB)

Read lesson note on Growth (JAMB)

Structural Adaptation For Survival

Variation In Population

Growth

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Question 37 Report

The flame cells are used for excretion in

Fluke

Nematode

Bacteria

Volvox

Answer Details

A flame cell is a specialized excretory cell found in the simplest freshwater invertebrates, including flatworms (fluke, planaria)

Flame cells function like a kidney, removing waste materials.
Excretion of ammonia waste through the body wall, and is not associated with any specific organs

Read lesson note on Animal Nutrition (WAEC)

Read lesson note on Excretory Systems And Mechanisms; Types Of Excretory Systems (WAEC)

Read lesson note on Amoeba, Paramecium, And Euglena (WAEC)

Read lesson note on Nervous Coordination (WAEC)

Animal Nutrition

Excretory Systems And Mechanisms; Types Of Excretory Systems

Amoeba, Paramecium, And Euglena

Nervous Coordination

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Question 38 Report

The host of Taenia Solium is _________

cow

pig

sheep

dog

Answer Details

The host of Taenia solium, also known as the pork tapeworm, is the pig. Taenia solium is a type of tapeworm that can live in the intestines of humans and pigs. Pigs become infected with the tapeworm when they ingest the eggs of the parasite, which can be present in contaminated food or water. Once inside the pig's digestive system, the tapeworm larvae hatch and penetrate the intestinal wall, then migrate to the pig's muscles and form cysts, which can be seen as small white spots in the meat. If a person eats undercooked pork that contains cysts of Taenia solium, they can become infected with the tapeworm. Once inside the human digestive system, the tapeworm can grow up to several meters long and attach itself to the intestinal wall, where it feeds on nutrients from the host's food. Therefore, it is essential to cook pork thoroughly and practice good hygiene to prevent infection with Taenia solium.

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Question 39 Report

Coloration of the eye is ______ variation

physiological

morphological

adaptive

recessive

Answer Details

Eye coloration is a caused by morphological variation

Read lesson note on Physiological Variations (WAEC)

Physiological Variations

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Question 40 Report

The lungs of the lung fish is an adaptation for respiration _______?

to complement gills while in water

to complement gills while on land

while on land

while in water

Answer Details

The lungs of the lungfish are an adaptation for respiration while on land. Lungfish are a unique group of fish that can survive in both water and on land. While in water, they use their gills to extract oxygen from the water, but when they are on land, they use their lungs to extract oxygen from the air. This ability to use both gills and lungs makes lungfish well adapted to survive in environments where water availability can fluctuate, such as in shallow waters or temporary ponds that may dry out seasonally. Thus, the lungs of lungfish are an important adaptation for respiration while on land, allowing them to breathe air and survive in their changing aquatic environments.

Read lesson note on Respiration (JAMB)

Respiration

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