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.
The kidneys of all vertebrates act as osmoregulators. This means that they
keep the composition of the plasma constant
regulate osmotic processes
control the volume of blood entering the kidneys
decrease the osmotic pressure of the blood
increase the osmotic pressure of blood
Correct answer is B
No explanation has been provided for this answer.
Which of the following substance is not found in urine?
Water
Sodium chloride
Nitrogenous compounds
Calcium chloride
Nitrogenous salts
Correct answer is D
No explanation has been provided for this answer.
What type of the following cells is thin-walled and living at maturity?
Collenchyma
Sieve tube
xylem vessel
sclerenchyma
Correct answer is A
No explanation has been provided for this answer.
In woody plants, grass and water vapour are transported across the stems by the
xylem fibres
medullary rays
sieve tubes
phloem fibres
phloem parenchyma
Correct answer is A
No explanation has been provided for this answer.
Which of the following statements is NOT true of mammalian erythrocytes?
They have haemoglobin
they appear yellow when looked at singly
They are disc shaped
The cell are more numerous than leucocytes
They have nuclei at maturity
Correct answer is E
No explanation has been provided for this answer.