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.
An organism whose source of carbon is inorganic is likely to be a/an
heterotrophic organism
autotrophic organism
symbiotic organism
parasitic organism
Correct answer is B
No explanation has been provided for this answer.
Pepsin is secreted as an inactive precursor called pepsinogen because
pepsin as an enzyme is quickly destroyed by the alkaline food from the mouth
all digestive enzymes pass through a precursor stage
pepsin is a proteolytic enzyme and might attack the stomach tissues
pepsin is not required in large quantities
Correct answer is B
No explanation has been provided for this answer.
Which of the following treatments would increase the rate of transpiration in a potted plant?
Placing it in a cold room
Placing it under a fan in a room
Putting it in a cupboard
Smearing grease on the lower surface of the leaves
Correct answer is B
No explanation has been provided for this answer.
The mesophyll layer of a leaf consists of
wax and cutin
cells with lignified walls
irregularly shaped collenchyma cells
photosynthetic parenchyma cells
Correct answer is D
No explanation has been provided for this answer.
The part of the ear that contains nerve cells sensitive to sound vibrations is the
cochlea
ampulla
tympanum
malleus
Correct answer is A
No explanation has been provided for this answer.