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 reason why hospitals use saline solutions as drip Instead of water is
because salt is a preservative
to prevent contamination of the body
to maintain the composition of body fluids
to increase the number of blood cells
Correct answer is C
No explanation has been provided for this answer.
The graph above shows the results of a laboratory investigation which measured the body temperatures of a lizard and a bird under changing artificial conditions. Use it to answer the question.
Homeostasis
Homoithermy
Poikilothermy
Osmoregulation
Correct answer is A
No explanation has been provided for this answer.
The graph below shows the results of a laboratory investigation which measured the body temperatures of a lizard and a bird under changing artificial conditions. Use it to answer the question.
Which of the statements below is valid?
The bird's blood was always warmer than that of the lizard
The body temperature of the bird varied less than that of the lizard during changes in environmental temperature
The body temperature of the bird remained constant despite changes in environmental temperature
The body temperature of the lizard was always close to that of the environmental temperature
Correct answer is B
No explanation has been provided for this answer.
Which of the following features is not a characteristic of arteries? Arteries
possess valves at internals throughout their length
have thick muscular and elastic walls
carry blood away from the heart
transport oxygenated blood with the exception of the pulmonary artery
Correct answer is A
*Caries blood away from heart
*Thick, muscular, elastic wall
*Blood is at high pressure and flows fast in spurts(pulse waves)
*Valves absent (except for semi-lunar valves near the heart)
*Blood is oxygenated (except that is pulmonary arteries)
Which of the following groups of organisms has kidney as the excretory organ?
Fishes, amphibians, birds, man
Fishes, amphibians, annelids, insects
Fishes, reptiles, birds, tapeworm
Fishes, protozoans, amphibians, man
Correct answer is A
All of the organisms listed in option A use kidneys as their excretory organ.