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 force that holds water together in the form of a stream within the xylem tube is the
cohesion of water molecules to one another by hydrogen bonds
force of gravity attacking the water molecules through the hydrogen bonds
attraction between the water and xylem osmotic force
normal flow of water from the ground with help of gravitational force
Correct answer is A
No explanation has been provided for this answer.
The richest source of vitamin A are
palm oil and groundnut oil
palm oil and carrot
rice and groundnut oil
oranges and carrot
Correct answer is B
No explanation has been provided for this answer.
The modes of nutrition in Nitrobacter, Ascaris, and Homo sapiens respectively are
photosynthetic , parasitic, and holozoic
chemosynthetic, parasitic, and holozoic
photosynthetic, parasitic, and heterophytic
chemosynthetic, holophytic, and holozoic
Correct answer is B
No explanation has been provided for this answer.
Mammals acclimatize to reduced oxygen content at high altitudes by
the stimulation of marrow to reduce the amount of erythrocytes produced
increasing the rate at which erythrocytes are destroyed
the stimulation of marrow to produce more erythrocytes
increasing the break down of the protein portion of the erythrocytes
Correct answer is A
No explanation has been provided for this answer.
The dark reaction of photosynthesis involves
fixation of carbon (IV) oxide to give six-carbon sugar
fixation of carbon (IV) oxide with the help of oxygen
use of carbon (IV) oxide to produce glucose using ATP
fixation of carbon (IV) oxide on chlorophyll using hydrogen
Correct answer is C
No explanation has been provided for this answer.