Biology Past Questions And Answers
Which of the following factors is not a source of variation in living organisms?
- A. Environment
- B. Inheritance
- C. Mitosis
- D. Meiosis
A sample of DNA is sequenced and found to contain 34% guanine. What percentage of thymine does it contain?
- A. 32%
- B. 0%
- C. 17%
- D. 16%
The use of a lighter instead of matchsticks is a way of conserving
- A. petroleum
- B. forest
- C. water
- D. wildlife
Water loss is regulated in plants and animals by both the
- A. scales and the skin
- B. scales and the hair
- C. thick leaves and the feathers
- D. leathery cuticle and the feathers
Which of the following structures is capable of producing more tissues in the stem of a herbaceous flowering plant?
- A. Epidermis
- B. Pericycle
- C. Xylem
- D. Cambium
The bicuspid valve is located between
- A. left auricle and left ventricle
- B. right auricle and right ventricle
- C. left and right ventricle
- D. left and right auricle
Each neurone consists of the following structures' except
- A. cell body
- B. dendrites
- C. axon
- D. white matter
The structure used by fishes to detect the presence and movement of other animals by the vibration they produce is the
- A. eye
- B. nostril
- C. lateral line
- D. scales
In Mendel's experiments, it was discovered that the skin of an African can be attributed to
- A. a blending of black and white genes
- B. recombination of genes
- C. loss of the epidermis
- D. mutation in the skin cells
The branch of science which deals with resemblances, origin and expression of biological variations is called
- A. embryology
- B. ecology
- C. entomology
- D. genetics