Biology questions and answers

Biology Questions and Answers

How well do you understand living things and their vital processes? Whether you are preparing for JAMB, WAEC, NECO and Post-UTME, these Biology past questions and answers cover such subjects as the chemistry of life, botany, evolution, genetics, ecology etc to help you know what to expect, improve your speed and confidence and be really prepared for the actual aptitude test.

31.

Use the information below to answer the question
I - making shoes from crocodile skin
II - making tables with plastic
III - using elephant tusk for decoration
IV - using firewood for cooking

The act that should be encouraged for the conservation of wildlife and forests is

A.

III

B.

IV

C.

II

D.

I

Correct answer is C

II - making tables with plastic: Encouraging the use of plastic for making tables is beneficial for wildlife and forests. By using plastic instead of wood for furniture, we reduce the demand for wood, which can help curb deforestation and preserve forest ecosystems. Reducing deforestation is vital for the conservation of wildlife, as forests provide critical habitat for numerous species.

32.

The diagram below is an illustration of some structures used for gaseous exchange in humans. Study it and answer the question.

the part labeled III can be found in the 

A.

lung

B.

heart

C.

kidney

D.

sternum

Correct answer is A

Bronchioles are small, narrow tubes that are part of the respiratory system and are found within the lungs. After the air passes through the trachea and bronchi, it enters the bronchioles, which represent the smaller airways within the lungs.

33.

The diagram below is an illustration of some structures used for gaseous exchange in humans. Study it and answer the question.

The parts labeled 1, II, III, and IV respectively are

A.

larynx, bronchus, bronchiole and trachea.

B.

bronchus, bronchiole, trachea and larynx.

C.

bronchiole, trachea, bronchus and larynx.

D.

larynx, trachea, bronchiole, and bronchus.

Correct answer is D

The parts labelled 1, II, III and IV respectively are larynx, trachea, bronchiole and bronchus
The larynx, commonly known as the voice box, is a cartilaginous structure located in the neck, just below the pharynx and above the trachea.
The trachea, also known as the windpipe, is a long tube made of C-shaped rings of cartilage that extend from the larynx to the bronchi.
Bronchioles are small, narrow tubes that branch out from the bronchi. They represent the smaller airways within the lungs.
The bronchi are the two main branches that arise from the lower end of the trachea, one leading to each lung.

34.

The androecium in a flowering plant is a collection of

A.

stamens

B.

sperms

C.

ovules

D.

filament

Correct answer is A

The androecium is the male reproductive part of a flowering plant, and it is composed of stamens. Each stamen consists of two main parts:
Filament
Anther

35.

The tricuspid valve is located between the

A.

right auricle and right ventricle

B.

aorta and the left ventricle

C.

left auricle and left ventricle

D.

right auricle and the superior vena cava

Correct answer is A

The heart has four chambers: two atria (auricles) and two ventricles. The tricuspid valve is one of the heart's valves and is located between the right atrium (right auricle) and the right ventricle.

36.

Fishes survive in water mainly because they possess

A.

streamlined body

B.

scales

C.

paired fins

D.

gills

Correct answer is D

Gills are specialized respiratory organs found in fish that allow them to extract oxygen from water. While a streamlined body, scales, and paired fins are all essential adaptations for fish to navigate and survive in water, none of them directly relate to the process of oxygen extraction and respiration like gills do. However, without gills, fish would not be able to respire efficiently underwater and would not survive in their aquatic habitats.

37.

The diagram below is an illustration of a cell in which photosynthesis takes place. Study it and answer the question.

the oxygen gas formed in the cell diffuses out of the cytoplasm into the air spaces through the part labeled

A.

I

B.

II

C.

III

D.

IV

Correct answer is C

No explanation has been provided for this answer.

38.

The diagram below is an illustration of a cell in which photosynthesis takes place. Study it and answer the question.

In which of the labeled parts would molecules of water and carbon (IV) oxide combine to form sugar?

A.

I

B.

III

C.

II

D.

IV

Correct answer is D

No explanation has been provided for this answer.

39.

Which of the following processes does not occur during photosynthesis?

A.

Energy from sunlight is absorbed

B.

Carbon (IV) oxide is evolved

C.

oxygen is evolved

D.

water is split

Correct answer is B

During photosynthesis, carbon dioxide is taken in by the plant, and water is split to produce glucose and oxygen in the presence of sunlight and chlorophyll.

40.

Growth in animals differs from that in plants because growth in

A.

plants is indefinite

B.

plants is intercalary

C.

animals is apical

D.

plants is from within

Correct answer is A

Growth in plants is indefinite: Unlike animals, which typically have a determinate growth, many plants exhibit indeterminate growth, especially in their early stages of life. Indeterminate growth means that plants can continue to grow throughout their lives, adding new tissues and expanding in size as long as favorable conditions are present.