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.
Plants that can survive in extremely dry places are called
Mesophytes
Xerophytes
Hydrophytes
Angiosperms
Correct answer is B
They are called Xerophytes because they are species of plant that have adaptations/adaptive features like waxy cuticles which enable them to survive in extremely dry land.
Only specially adapted microorganisms are found in
Salty water
Humid air
Moist soil
Mouth cavities
Correct answer is A
Halophiles are organisms that thrive in high salt concentrations. The adaptations of halophile organisms to their environment are:
(a) The integrity of non-halophile macromolecules is compromised, and the flow of water out of the cell produces a Turgor effect. • (b) Moderate halophiles maintain their structures via the synthesis of compatible organic solutes. • (c) Extreme halophiles maintain their structures via equilibration of cellular and environmental salt concentrations.
Which of the following is the effect of using artificial pollination in plant breeding?
Production of healthy crops
Lengthening the maturity time of crops
Making crops susceptible to disease
Improvement of the variety of crops
Correct answer is D
One of the effects of using artificial pollination in plant breeding is that it improves the variety of crops.
Which of the following is a nitrifying bacterium?
Rhizobium
Nictrobacter
Azotobacter
Pseudomonas
Correct answer is B
Nitrobacter are chemoautotrophic organisms found in soil and water, and responsible for the oxidation of ammonium to nitrite and nitrite to nitrate.
The study of an individual organism or a single specie of an organism and its environment is
Autecology
Ecological concepts
Synecology
Biotic composers
Correct answer is A
Autecology is the study of an individual organism or a single specie of organism and no environment