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.

111.

Which of the following processes is involved in the reproduction of developing organisms?

A.

Budding

B.

Germination

C.

Fertilization

D.

Pollination

Correct answer is C

Fertilization is the process by which the male and female gametes (reproductive cells) fuse to initiate the development of a new organism.

112.

Which of the following is an example of an abiotic ecological factor?

A.

Temperature

B.

Competition

C.

Predation

D.

Symbiosis

Correct answer is A

Abiotic ecological factors are non-living factors that influence an ecosystem. They include physical and chemical factors such as temperature, sunlight, water availability, soil composition, and air quality.

113.

What is the tissue responsible for transporting water and minerals from the roots to the rest of the plant?

A.

Xylem

B.

Epidermis

C.

Parenchyma

D.

Phloem

Correct answer is A

The tissue responsible for transporting water and minerals from the roots to the rest of the plant is called xylem. Xylem is a complex tissue composed of specialized cells, such as tracheids and vessel elements, which form long, interconnected tubes. These tubes facilitate the upward movement of water and minerals through the plant. Xylem also provides mechanical support to the plant.

114.

In monohybrid inheritance, if an organism carries two different alleles for a particular gene, it is called:

A.

Homozygous

B.

Dominant

C.

Heterozygous

D.

Recessive

Correct answer is C

In monohybrid inheritance, the inheritance of a single gene is considered. An organism that carries two different alleles for a particular gene is referred to as heterozygous. The alleles may have different versions or variations of the gene. Heterozygous individuals carry two different alleles, with one being dominant and the other recessive.

115.

Most fishes do not sink in water because of the presences of:
I. swim bladder
II. air bladder
III. air sacs
IV. air in spongy bones

A.

II and III are correct

B.

I and II are correct

C.

I, II, III, and IV are correct

D.

III and IV are correct

Correct answer is B

Fishes have a swim bladder or air bladder which helps them to remain buoyant without sinking in water. They are present in the body cavity.

116.

Which gland is responsible for producing the hormone insulin?

A.

Thyroid gland

B.

Pituitary gland

C.

Pancreas

D.

Adrenal gland

Correct answer is C

The pancreas is an organ located in the abdomen, and it serves both digestive and endocrine functions. In terms of hormone production, the pancreas is responsible for producing insulin. Insulin plays a crucial role in regulating blood sugar levels by facilitating the uptake of glucose into cells.

117.

Which of the following is the primary organ involved in gas exchange during respiration in humans?

A.

Diaphragm

B.

Bronchi

C.

Lungs

D.

Trachea

Correct answer is C

The primary organ involved in gas exchange during respiration in humans is the lungs. The lungs are a pair of respiratory organs located in the chest cavity. They are responsible for the exchange of oxygen and carbon dioxide between the air and the bloodstream.

118.

The term cell was given by

A.

Robert Hooke

B.

Schwann

C.

De Bary

D.

Tatum

Correct answer is A

The term cell was given by Robert Hooke. The term cell was coined by Robert Hooke. Robert Hooke observed a honeycomb-like structure under the microscope while cutting a thin section of cork, hence he named the structure as a cell.

119.

Which of the following represents an example of ecological management and conservation through a biological association?

A.

Constructing dams for hydroelectric power

B.

Introducing invasive species for pest control

C.

Clear-cutting forests for timber extraction

D.

Establishing marine protected areas

Correct answer is D

Ecological management and conservation involve strategies and practices aimed at preserving and protecting natural ecosystems and their biodiversity. Among the options provided, the establishment of marine protected areas is an example of such management and conservation through a biological association.

120.

Which of the following are components of the skeletal system in humans?

A.

Cartilage and blood vessels

B.

Ligaments and tendons

C.

Muscles and nerves

D.

Bones and joints

Correct answer is D

The skeletal system in humans is composed of bones and joints. Bones and joints are the primary components of the human skeletal system.