Waec Biology Past Questions
Question 21
Raw materials required by green plants to manufacture their food are
- A. mainly fluids
- B. inorganic substances
- C. living materials
- D. mainly gases
Question 22
Which of the following glands secretes a substance into the blood stream of a frightened person?
- A. Adrenal glands
- B. Salivary glands
- C. Gastric glands
- D. Parathyroid glands
Question 23
Which of the following takes place when a person’s body temperature rises above 37oC
- A. Sweating and vasoconstriction
- B. Panting and vasoconstriction
- C. Sweating and vasodilation
- D. Panting and vasodilation
Question 24
A faster colour change of a dry cobalt chloride paper affixed to the lower surface of a leaf than the upper one, indicates that
- A. sunlight slows down water loss from the upper surface
- B. the lower surface of the leaf has more stomata
- C. Sunlight causes the stomata on the upper surface to close
- D. stomata are not present on the upper surface of a leaf
Question 25
In plant respiration occurs in
- A. mesophyll cells only
- B. the root only
- C. the stomata and lenticel only
- D. all living cells
