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.
Gregor Mendel is regarded as the father of ______
variation
genetics
mycology
natural selection
Correct answer is B
Gregor Mendel, through his work on pea plants, discovered the fundamental laws of inheritance.
He deduced that genes come in pairs and are inherited as distinct units, one from each parent. Mendel tracked the segregation of parental genes and their appearance in the offspring as dominant or recessive traits.
Erythrocytes are known as ________
white blood cell
red blood cells
phagocytes
leucocytes
Correct answer is B
A red blood cell(erthyrocytes), which (in humans) is typically a biconcave disc without a nucleus.
Erythrocytes contain the pigment haemoglobin, which imparts the red colour to blood, and transport oxygen and carbon dioxide to and from the tissues.
The key event in the transition of the amphibians from water to land is the ________
replacement of the gills with lungs
possession of webbed limbs
limbs
possession of tympanic membrane
Correct answer is A
Amphibians display some interesting and changing characteristics as they metamorphose through various forms on their way to adulthood. The frog, for instance, begins life underwater as a larva with gills and becomes and air-breather with lungs as an adult.
&therefore4; in case of draught, frog can amphibians can use lungs to breathe on land.
Which of the following is an example of active transport?
Oxygen exchanging between red blood cells and liver cells
Carbon dioxide exchanging between muscle cells and red blood cells
Water moving out of the small intestine
Sodium being reabsorbed in the kidney
Correct answer is D
Although sodium ions are small, their charge prevents them from moving across the cell membrane through simple diffusion. They must be transported using active transport.
The lungs of the lung fish is an adaptation for respiration _______?
to complement gills while in water
to complement gills while on land
while on land
while in water
Correct answer is B
Lungfish are best known for retaining the ability to breathe air, to survive drought.