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 following processes are involved during expiration in man except
The intercostal muscles relax
The thoracic cavity first increases in volume
The sternum moves inward
The ribs are moved downwards and inwards
Correct answer is B
During the respiration process in man, under the expiration process, the thoracic cavity does not increase in volume.
One of the following is not the theory of natural selection stated by Charles Dawin
Characteristics acquired through use or disuse are transmitted offspring
Variations appear by themselves in a population
Heredity variations are transmitted to offspring
Species that are the fittest for the environment contribute more offsprings to the next needs of the generation
Correct answer is A
Charles Darwins theory is that of natural selection not of use and disuse.
The glomerular filtrate contains the following except
Water
Urea
Blood Corpuscles
Glucose
Correct answer is C
The glomerulus helps in the mechanism of excretion (formation of urine) in mammals. It does not contain the blood corpuscles.
Which of the following statements describes an autonomic nervous system?
It always stimulates effectors
Activities are voluntary
It dials with external stimuli and their responses
It affects glands, cardia muscles, and smooth muscles
Correct answer is D
The autonomic nervous system is concerned with the control of the body's involuntary activities e.g breathing, heartbeat, digestion, etc.
Which of the following controls all voluntary actions?
Olfactory lobes
Cerebrum
Hypothalamus
Pons varolii
Correct answer is B
The Cerebrum is the largest part of the brain and it controls all voluntary actions like speech, dancing, etc., It is also concerned with the concentration and coordination of impulses.