Biology Past Questions And Answers
In plant cells the role of the membrane is played by the
- A. nucleolus
- B. cell wall
- C. cytoplasm
- D. mitochondrion
At fertilization
- A) one chromosomes from the male joins another from the female
- B) one gene from the male combines with the another from the female
- C) the male nucleus fuses with the female nucleus
- D) one set of chromosome combines with another set from the female
The element common to protein carbohydrate and lipid is
- A. hydrogen
- B. sulphur
- C. nitrogen
- D. phosphorus
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
An association between two organisms where both members benefit is known as _______
- A) symbiosis
- B) commensalism
- C) ammensalism
- D) mutualism
An inferior ovary of a flower is situated
- A. below the floral parts
- B. above the floral parts
- C. at the same level with all the floral parts
- D. at the centre of the floral parts
Which of the following statement is not a reason for banning bush burning? It
- A. allows for quick regrowth of grasses
- B. Kills soil microorganisms.
- C. leaves the soil bare of vegetation
- D. burns off organic soil nutrients
The table below indicates the result of an experiment during which grains of different colours in two maize cobs were counted Maize cob White Pink Red I 30 60 30 II 50 99 49 Which of the following ratios agrees with the result?
- A. 9:3:3
- B. 1:2:1
- C. 1:3:1
- D. 2:1:1
Which of the following statements is not true about continuous variation? It
- A. is usually controlled by several genes
- B. can be influenced by environmental factors
- C. follows a normal distribution curve
- D. is usually controlled by one or two pair(s) of genes
The scientist who discovered the cell while examining a thin slice of cork under the microscope was
- A. Robert Hooke
- B. Anton van Leeuwenhoek
- C. Matthias Schleiden
- D. Theodor Schwann