Biology Past Questions And Answers
461
The vector of the malaria parasite is
- A. female Aedes mosquito
- B. female Anopheles mosquito
- C. male Culex mosquito
- D. female Culex mosquito
462
At what stage in the life history of a mammal is the sex of an individual set?
- A. at adolescence
- B. at puberty
- C. at birth
- D. at conception
463
Which of the following is not a function of the blood?
- A. Maintenance of body temperature
- B. Formation of clot
- C. Distribution of bile
- D. Transportation of excretory materials
464
Which of the following statements would be a correct observation at the end of the experiment? Water moves
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- A. highest in sandy soil
- B. lowest in loamy soil
- C. to the same level in all soil types
- D. highest in clayey soil
465
_______ is not a green house gas
- A) Carbon dioxide
- B) Methane
- C) Chlorofluorocarbon
- D) Hydrogen sulphide
466
In testing for starch in a leaf, the leaf is first boiled in water for about a minute so that the
- A. cell walls are hardened
- B. cells are killed
- C. chlorophyll is dissolved out
- D. iodine will penetrate
467
Most of the energy in the cell is produced in the
- A. mitochondrion
- B. lysosome
- C. plastid
- D. Golgi apparatus
468
What is the probability of a man of blood group AB married to a woman of blood group O producing a child of blood group O?
- A. 0%
- B. 25%
- C. 50%
- D. 75%
469
The organelle which eliminate water from the body of protozoa is
- A. plasma membrane
- B. contractile vacuole
- C. cell wall
- D. Protoplasm
470
Which of the following substances has the highest amount of energy in joules per unit weight?
- A. Carbohydrates
- B. Proteins
- C. Fats
- D. Vitamins