How well do you understand living things and their vital processes? Whether you are preparing for JAMB, WAEC, NECO and Post-UTME, these Biology past questions and answers cover such subjects as the chemistry of life, botany, evolution, genetics, ecology etc to help you know what to expect, improve your speed and confidence and be really prepared for the actual aptitude test.
Which of the following statements is true about movement of the forearm? In
bending the arm, the biceps relax and the triceps contract
bending the arm, the biceps contract and the triceps relax
straightening the arm the biceps contract and the triceps relax
straightening the arm, both biceps and triceps contract
Correct answer is B
To bend the arm, the biceps contracts and pulls on the radius. Simultaneously, the triceps relaxes.
The role of ATP include all the following activities except
provision of energy to do work in living organisms
transmission of nerve impulse
keeping the body warm in homoithermic animals
producing water during aerobic respiration
Correct answer is B
No explanation has been provided for this answer.
Raw materials required by green plants to manufacture their food are
mainly fluids
inorganic substances
living materials
mainly gases
Correct answer is B
No explanation has been provided for this answer.
Which of the following statements defines plasmolysis?
Shrinking of a plant cell in a solution
Shrinking away of cytoplasm from an animal cell membrane
Shrinking away of the cytoplasm from the plant cell wall
shrinking of the vacuole and leaving the cytoplasm attached to the cell wall
Correct answer is C
No explanation has been provided for this answer.
Which of the following substance pass through the root cell membrane by osmosis?
Cell sap
Carbon dioxide
oxygen
water
Correct answer is D
No explanation has been provided for this answer.