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.
filtration
centrifugation
precipitation
sedimentation
Correct answer is D
No explanation has been provided for this answer.
Euglena → water lily → Spirogyra → grass
water lily → Spirogyra →grass → Euglena
Spirogyra → Euglena → grass → water lily
Euglena → Spirogyra → water lily → grass
Correct answer is C
No explanation has been provided for this answer.
The Southern Guinea Savanna differs from the Northern Guinea Savanna in that it has
lower rainfall and shorter grasses
less grasses and scattered trees
more rainfall and taller grasses
less arboreal and burrowing animals
Correct answer is C
No explanation has been provided for this answer.
Adaptive features of plants to desert conditions include?
thick barks, succulent stems, and sunken stomata
thin barks, succulent stems, and sunken stomata
thin barks, air floats on stems, and sunken stomata
air spaces in tissues, adventitious roots, and thick barks
Correct answer is A
The leaves and stems of many desert plants have a thick, waxy covering.
This waxy substance does not cover the stomata, but it covers most of the leaves, keeping the plants cooler and reducing evaporative loss.
Small leaves on desert plants also help reduce moisture loss during transpiration.
Eg cactus plants: · thick, waxy skin to reduce loss of water and to reflect heat · large, fleshy stems to store water · thorns and thin, spiky or glossy leaves.
Toads and lizards in an ecosystem depend on a limited quantity of food. This is an example of
parasitism
intraspecific competition
predation
interspecific competition
Correct answer is D
No explanation has been provided for this answer.