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.
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.
During thunderstorms the energy of lightning discharge causes
oxygen and nitrogen to combine
more carbon dioxide to be formed
nitrites to be converted to nitrates
nitrates to be converted to nitrogen
death
Correct answer is A
No explanation has been provided for this answer.
If a baby is a female, her mother's ovum must have been fertilized by a sperm carry the chromosome
X
XY
XX
YY
Y
Correct answer is A
No explanation has been provided for this answer.