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 these pairs best illustrates a symbiotic association?
dodder on green plants
ferns growing on palm trees
lice on hair of mammals
sea anemone attached to hermit crab
tick found on the body of a cow
Correct answer is D
No explanation has been provided for this answer.
fission
fusion
meiosis
mitosis
oogenesis
Correct answer is C
In preparation for meiosis, a germ cell goes through the interphase, during which the entire cell (including the genetic material contained in the nucleus) undergoes replication.
Which of the following sequences best illustrates a food chain in an aquatic habitat ?
algae → fungi → toad → snake
diatoms → tadpole → fish → kingfisher
grass → grasshopper → toad → whale
phytoplankton → fish → snake → kingfisher
zooplankton → tadpoles → fish → kingfisher
Correct answer is B
No explanation has been provided for this answer.
The streaming movement of cytoplasm observed in a freshly cut leaf of a water plant is termed
amoeboids
centrifugal motion
ciliary motion
cyclosis
osmosis
Correct answer is D
No explanation has been provided for this answer.
Chewing the cud is an adaptation peculiar to
Herbivores
Omnivores
Rodents
Ruminants
Correct answer is D
Cud chewing is also necessary because the foods ruminant animals eat are difficult to digest and it takes extra effort to get all of the nutrients from the food.
Other examples of ruminant animals include deer, camels, buffalo, goats, sheep, and giraffes.
The main difference between ruminant and non-ruminant animals is that ruminant animals are herbivores whereas non-ruminant animals are omnivores or carnivores.
Thus, ruminant animals have a complex rumen to digest plant material while non-ruminant animals have a simple stomach since their food is easy to digest.
Non-ruminant animals are animals with a single-compartment stomach, such as swine, poultry, horses, dogs, cats, and humans.