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.
Spider belongs to which of the following classes in the phylum arthropoda?
Arachnida
Chilopoda
Crustacean
Insect
Myriapoda
Correct answer is A
No explanation has been provided for this answer.
The group of organisms at the base of the pyramid of numbers are
decomposers
primary consumers
producers
secondary consumers
tertiary consumers
Correct answer is C
No explanation has been provided for this answer.
commensalism
mutualism
parasitism
saprophytism
symbiosis
Correct answer is A
No explanation has been provided for this answer.
The organism that can carry out both autotropic and heterotrophic modes of nutritions is
Chlamydomonas
Eudorina
Euglena
Spirogyra
Correct answer is C
Euglena use their chloroplasts to produce nutrients through photosynthesis. It is a dual organism as it can act both as an autotroph, making its own food, and heterotroph, feeding on other substances.
An example of osmosis in plants is the
movement of water through the xylem
loss of water vapour from the stomata
translocation of food through the phloem
absorption of water from the soil by the root
Correct answer is D
Osmosis is responsible for the ability of plant roots to draw water from the soil. Plants concentrate solutes in their root cells by active transport, and water enters the roots by osmosis.