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.
What is the primary source of variation in a population?
Gene flow
Mutation
Natural selection
Genetic drift
Correct answer is B
The primary source of variation in a population is mutation. Mutation is a spontaneous change in the DNA sequence of an organism's genome. It introduces new genetic variations by altering the existing genetic information.
Which of the following statements about the heart is true?
The heart is responsible for the production of red blood cells
The heart pumps oxygenated blood to the lungs
The heart receives blood from the kidneys and filters waste products
The heart is a muscular organ that contracts to circulate blood throughout the body
Correct answer is D
The heart is a vital organ in the circulatory system responsible for pumping and circulating blood throughout the body.
Ecological niche
Limiting factor
Carrying capacity
Density-dependent factor
Correct answer is C
Carrying capacity refers to the maximum number of individuals of a species that a particular environment can sustain over a prolonged period of time. It represents the balance between the available resources in the environment and the population's demand for those resources.
What is the definition of population ecology?
The study of interactions between organisms and their physical environment
The study of evolutionary processes and their effects on populations
The study of interactions between different populations in an ecosystem
The study of the distribution and abundance of individuals within a species
Correct answer is D
Population ecology is a branch of ecology that focuses on the study of populations of organisms belonging to the same species. It involves examining how populations are distributed across different habitats and how their numbers change over time.
One important characteristics of green plant is that they
possess specialized sense organs
Are usually motile
Are autotropic
Respond slowly to stimuli
Correct answer is C
One of the important characteristics of green plant is that they can manufacture their food (Autotrophic).