JAMB Biology Past Questions & Answers - Page 11

51.

Which of the following traits is not visible in a person with Down's syndrome?

A.

Short neck

B.

High muscle tone

C.

Small stature

D.

Slant eyes

Correct answer is B

People with Down's syndrome always have intellectual or physical disabilities. High muscle tone is not visible in a person with Down's syndrome

52.

Which of the following is an example of a behavioral adaptation for survival in animals?

A.

Sharp teeth

B.

Migration

C.

Wings

D.

Camouflage

Correct answer is B

Migration is an example of a behavioral adaptation for survival in animals. Migration refers to the regular movement of animals from one place to another, often over long distances. Animals may migrate to find better food sources, suitable breeding grounds, or more favorable climates.

53.

Which of the following is a male reproductive organ in humans?

A.

Uterus

B.

Ovary

C.

Testis

D.

Fallopian tube

Correct answer is C

The testis is a male reproductive organ in humans. It is responsible for producing sperm cells and secreting the male sex hormone testosterone. The testes are located within the scrotum, outside the abdominal cavity.

54.

The theory of evolution can be defined as

A.

The belief that all species were created in their current form

B.

The hypothesis that organisms strive to improve themselves over generations

C.

The idea that species change over time through natural processes

D.

The concept that evolution occurs through a series of sudden and dramatic changes

Correct answer is C

The theory of evolution is a scientific explanation for the diversity of life on Earth. It states that species change over time through a process known as natural selection. This theory, proposed by Charles Darwin and Alfred Russel Wallace in the 19th century, suggests that populations of organisms evolve over generations in response to changes in their environment.

55.

What is autotrophic nutrition?

A.

Nutrition in which organisms obtain food by breaking down complex organic compounds

B.

Nutrition in which organisms obtain food from other organisms

C.

Nutrition in which organisms obtain food by consuming both plants and animals

D.

Nutrition in which organisms produce their own food using energy from the sun or inorganic substances

Correct answer is D

Autotrophic nutrition refers to the ability of organisms to synthesize their own food molecules from simple inorganic substances such as carbon dioxide and water.