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.
Which of the following is associated with the dark stage of photosynthesis?
Assimilation of Carbon(IV)oxide
Photophosphorylation
Photolysis
Excitation of chlorophyll
Correct answer is A
Dark stage, also known as biosynthetic or assimilatory, is the second stage in photosynthesis;
in this stage, a cluster of reactions; solar light is not needed and converts carbon dioxide – among other complexes into sugars.
some enzymes are involved in carbon assimilation process depend on solar light.
In Nigeria, Southern Guinea Savanna is found in?
Borno and Sokoto
Kogi and Kwara
Kaduna and Cross River
Kano and Niger
Correct answer is B
Southern Guinea Savanna occurs in parts of Oyo, Ondo, Osun, and Kwara states.
Succession that occurs on an abandoned farm land is?
tertiary
secondary
primary
climax
Correct answer is B
Succession can be defined as a progressive natural development of vegetation towards a climax during which one community is gradually replaced by others. The abandoned farmland is a secondary succession as a result of the fact that it follows a partial destruction of the original vegetation.
The waste product of insects is?
uric acid
urine
Mucilage
sweat
Correct answer is A
Most terrestrial insects produce uric acid as their main nitrogenous waste product. Uric acid is a relatively non- toxic and highly insoluble waste product.
Therefore, it can crystallize out of solution, and may be either retained in the body, or eliminated as a solid waste material with little water loss.
During mitosis, the stage at which chromosomes lines up around the equator is?
telophase
metaphase
anaphase
prophase
Correct answer is B
Mitosis is understood to involve five phases based on the physical state of the chromosomes and spindle. These phases are prophase, prometaphase, metaphase, anaphase, and telophase.
Metaphase is the third phase of mitosis, which is a process that separates the duplicated genetic material carried in the nucleus of a parent cell into two, identical daughter cells