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.
Vaccination is carried out in order to
check the production of poison
increase the activities of white blood cells
increase the number of red blood cells
stimulate the production of antibodies
Correct answer is D
No explanation has been provided for this answer.
0.75
0.25
0.5
0.1
Correct answer is C
A sickle cell carrier (AS) and a normal woman (AA), when crossed will yield: 2 normal offsprings (AA) and 2 sickle cell carrier (AS). Hence, the probability of a normal child = \(\frac{2}{4}\) = \(0.5\)
Floating microscopic heterotrophs are mostly grouped as
phytoplankton
zooplankton
microbes
nekton
Correct answer is B
Phytoplankton are microscopic marine organisms that sit at the bottom of the food chain, most phytoplankton are buoyant and float in the upper part of the ocean. However, they are not heterotrophic like the zooplanktons.
microbes are living organisms around us that we can't see with our naked eyes.
nektons are organisms that are able to swim and move independently of current.
The biological association that contributes directly to succession in a community is
competition
predation
parasitism
commensalism
Correct answer is A
competition between species in a particular habitat is a biotic factor of ecological primary succession.
A group of organisms of different species living in a particular area is described as a
colony
community
population
niche
Correct answer is B
A community is formed by populations of different species living together and interacting with each other. A community forms an ecosystem by its interaction with the abiotic environment.