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.
Insect show consideration powers of water conservation. This is due to the fact that
The chitinous cuticle is impregnated with tanned protein
Nitrogenous waste is eliminated as urea
Chitin is impermeable to water
The malpighian tubules are impermeable to water
The curticle is covered with wax
Correct answer is C
No explanation has been provided for this answer.
Which of these is not true? grass in the above food chain
trap all the sunlight
trap a small percent of the sun energy
are primary producers
are eaten by primary consumers
contains chlorophyll
Correct answer is A
No explanation has been provided for this answer.
grasses
grasshopper
lizards
snakes
hawks
Correct answer is E
No explanation has been provided for this answer.
The major function of contractile vacuole in amoeba is?
to secrete enzyme to digest food particles
to store excess food materials
to excrete nitrogenous waste
to absorb water from the surrounding
to collect and expel water in the cytoplasm
Correct answer is E
- The contractile vacuole (CV) complex is an osmoregulatory organelle of free-living amoebae and protozoa, which controls the intracellular water balance by accumulating and expelling excess water out of the cell, allowing cells to survive under hypotonic stress as in pond water.
- This implies that the contractile vacuole, as its name suggests, expels water out of the cell by contracting.
a → b → e → f → d
b → d → f → e → c
d → b → e → c → f
b → a → f → e → c
f → e → c → d → c
Correct answer is C
No explanation has been provided for this answer.