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.
Which of the following statements is correct about diffusion?
it involves movement of water molecules only
Molecules move from a region of higher concentration to a region of lower concentration
differentially permeable membrane must be present for diffusion to occur
It involves when a solute can no longer dissolve in a solvent of only solute molecules into the Bowman's capsule
It occurs when a solute can no longer dissolve in a solvent
Correct answer is B
No explanation has been provided for this answer.
The mechanism of gaseous exchange in living organisms is essentially by
osmosis
inhalation
diffusion
exhalation
breathing
Correct answer is C
No explanation has been provided for this answer.
The organelle that eliminates water from the body of protozoa is
plasma membrane
contractile vacuole
cell wall
protoplasm
nucleus
Correct answer is B
No explanation has been provided for this answer.
The cell is a functional unit of living organisms because
multicellular organisms are made up of cells
all cells in a multicellular organism function as a single cell
the function of a multicellular organism is the sum total of the functions of its constituent cells
the function of a single cell is superior to that of the multicellular organism
the cells of a multicelullar organism are structurally similar
Correct answer is A
No explanation has been provided for this answer.
Mammals are capable of producing hypertonic urine mainly because of re-absorption in the
Bowman's capsule
Urethra
Ureter
Loop of henle
Correct answer is D
No explanation has been provided for this answer.