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.
Use the diagram below to answer this question.
Emulsification of fats takes place in the part labelled?
l
ll
lll
lV
Correct answer is D
Fat emulsification is the process of increasing the surface area of fats in the small intestine by grouping them into small clusters.
This is the responsibility of bile, a liquid created by the liver and stored in the gallbladder. Actual digestion of the fats is then accomplished by lipase, an enzyme from the pancreas
Use the diagram below to answer this question.
spongy mesophyll
upper epidemis
cuticle
vein
Correct answer is C
The plant cuticle is the outermost layer of plants. It covers leaves, fruits, flowers, and non-woody stems of higher plants.
It protects plants against drought, extreme temperatures, UV radiation, chemical attack, mechanical injuries, and pathogen/pest infections.
The central nervous system in humans is made up of the
brain, medulla oblongata and nerves
brain, spinal cord and cranial nerves
brain and spinal nerves
brain and spinal cord
Correct answer is D
No explanation has been provided for this answer.
High intake of carbohydrates
Low production of insulin
Low intake of carbohydrates
High production of insulin
Correct answer is B
No explanation has been provided for this answer.
Use the diagram below to answer this question.
The structure that controls loss of water vapour during transpiration is labelled
l
ll
lll
lV
Correct answer is D
The stomata regulates gas exchange between the plant and environment and controls water loss by changing the size of the stomatal pore.
Guard cells are cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata.