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 light sensitive cells in the human eye is called the ...............
Choroid
Sclerotic layer
retina
cones
Correct answer is D
Cone cells or cones, are one of two types of photo-receptor cells in the retina of the eye. They are responsible for color vision and function best in relatively bright light, as opposed to rod cells, which work better in dim light. Cone cells are densely packed in the fovea centralis, a 0.3 mm diameter rod-free area with very thin, densely packed cones which quickly reduce in number towards the periphery of the retina. There are about six to seven million cones in a human eye and are most concentrated towards the macula.
A group of similar organisms inhabiting the same environment is called
ecosystem
habitat
population
species
Correct answer is C
No explanation has been provided for this answer.
Which organ removes the largest amount of excess water from the body?
Liver
Lung
Kidney
skin
Correct answer is C
Lungs: Remove carbon dioxide.
Skin: Sweat glands remove water, salts, and other wastes.
Large intestine: Removes solid waste and some water in the form of faeces.
Kidneys: Remove urea, salts, and excess water from the blood.
Which of the following serves as the brain box in humans?
skeleton
skull
head
spinal column
Correct answer is B
No explanation has been provided for this answer.
biomes
biosphere
community
ecology
Correct answer is C
Option A is wrong because a biome is a regional or global land area that is characterized by the plants, animals, and climate in that area.
Option B is wrong because the biosphere is the part of the earth that supports life.
Option C is correct because a community consists of different organisms living together in a habitat.
Option D is wrong because ecology is the study of the relationship between organisms and their environment.