Jamb 2023 Biology Past Questions And Answers
1
Which of the following is a male reproductive organ in humans?
- A. Uterus
- B. Ovary
- C. Testis
- D. Fallopian tube
2
The alternate form of a gene is
- A. Alternate type
- B. Dominant character
- C. Recessive character
- D. Allele
3
Which of the following is an example of a behavioral adaptation for survival in animals?
- A. Sharp teeth
- B. Migration
- C. Wings
- D. Camouflage
4
What is the primary source of variation in a population?
- A. Gene flow
- B. Mutation
- C. Natural selection
- D. Genetic drift
5
Which of the following is NOT a part of the alimentary canal?
- A. Oesophagus
- B. Large intestine
- C. Liver
- D. Small intestine
6
Which of the following traits is not visible in a person with Down syndrome?
- A. Short neck
- B. High muscle tone
- C. Small stature
- D. Slant eyes
7
Which of the following eye defects is caused by the inability of the eye to focus light on the retina?
- A. Glaucoma
- B. Myopia
- C. Cataracts
- D. Astigmatism
8
Which of the following is a characteristic of cells related to irritability?
- A. Ability to respond to stimuli
- B. Ability to synthesize proteins
- C. Ability to generate energy
- D. Ability to replicate DNA
9
What is the term used to describe the maximum number of individuals of a species that an environment can support indefinitely?
- A. Ecological niche
- B. Limiting factor
- C. Carrying capacity
- D. Density-dependent factor
10
Which of the following best describes a natural habitat in ecology?
- A. An area where organisms naturally live and interact with their surroundings
- B. A human-created environment for wildlife conservation
- C. A controlled laboratory setting for ecological experiments
- D. A protected area for endangered species