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 energy released by 1 gram of glucose is
6 kcal
4 kcal
5 kcal
3 kcal
Correct answer is B
Protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.
Which of the following animals is cold blooded?
Cat
Lizard
Whale
Bird
Correct answer is B
Reptiles are cold-blooded animals. This means that they cannot produce heat in their own bodies, and have to rely on their surroundings to keep warm. This is why most reptiles are found in hot or warm climates. Reptiles like snakes and lizards are this type of animal. Amphibians like frogs, toads, and salamanders are, too. Fish are also cold-blooded animals.
The role of the scolex in tapeworms is to
excretion
attachment
movement
breathing
Correct answer is B
An adult tapeworm consists of a knoblike head, or scolex, equipped with hooks for attaching to the intestinal wall of the host (which may be a human), a neck region, and a series of flat, rectangular body segments, or proglottids, generated by the neck.
The total salt content in blood is about
1.85 to 1.9%
11.85 to 11.9%
2.85 to 2.9%
0.85 to 0.9%
Correct answer is D
The total salt content of blood plasma is approximately about 0.85 - 0.9%
At what stage in this cycle can a man be infected?
2
4
5
6
Correct answer is B
In the animal’s intestine, the oncospheres hatch, invade the intestinal wall, and migrate to the striated muscles, where they develop into cysticerci. A cysticercus can survive for several years in the animal. Humans become infected by ingesting raw or undercooked infected meat.