Biology Past Questions And Answers
The spores of ferns are dispersed by
- A. wind
- B. water
- C. insects
- D. explosive mechanism
Which of the following endocrine glands is a master gland?
- A. Pituitary gland
- B. Thyroid gland
- C. Pancreas
- D. Ovary
Which of the following mammalian features acts as a shock-absorber to the developing embryo?
- A. Amniotic fluid
- B. Umbilical cord
- C. Placenta
- D. Amnion
The modes of nutrition in Nitrobacter, Ascaris and Homo sapiens respectively are
- A. photosynthetic , parasitic and holozoic
- B. chemosynthetic, parasitic and holozoic
- C. photosynthetic, parasitic and heterophytic
- D. chemosynthetic, holophytic and holozoic
Which of the following is a product of brewing when yeast is used as a fermenting agent?
- A. Nitrogen
- B. Oxygen
- C. Malt
- D. Ethanol
A man who has the trait for colour blindness marries a normal woman. What percentage of their children would be sufferers, carriers and normal respectively
- A. 25%, 25% and 50%
- B. 25%, 50% and 25%
- C. 50%, 25% and 25%
- D. 25%, 37.5% and 37%
In which of these associations is much harm done to one of the partners?
- A) symbiosis
- B) commensalisms
- C) parasitism
- D) mutualism
Which of the following statements is true about sandy soil?
- A. has limited air space
- B. is light and easy to dig
- C. drains slowly
- D. is heavy and poorly aerated
The structure used for movement in Amoeba is
- A. cilia
- B. pseudopodia
- C. flagella
- D. endoplasm
The gas produced during tissue respiration can be identified by using
- A. calcium hydroxide
- B. copper sulphate
- C. calcium carbonate
- D. sodium hydroxide