2025 JAMB Biology Past Questions

In which one of the following groups of organisms do all the members have asexual methods of reproduction?

Magnesium is utilized in the formation of 

If the bark and phloem tissues of a woody shoot are peeled off by ringing, the whole plant will eventually die because 

Which of the following is not a function of the liver?

In the enzymic reaction

\( \scriptsize Starch \underset{Amylase}{\rightarrow} Sugar\)

starch is referred to as the 

In a positive phototropic response of a coleoptile, the region of greatest curvature is brought about by the 

Which of the following is incorrect? The prothallus of a fern

The maize grain is a fruit and not a seed because it 

If a person is bitten by a snake on the leg, it is advisable for him to

In which of the following crosses will all the female offspring be colour blind?

Which of these groups of animals is likely to be found in fresh water?

There will be agglutination when the

Which of the following constitutes pollution?

A food web is more stable than a food chain because

Fossil records found in sedimentary rocks offer some explanation for the theory of evolution because 

Which of the following is the correct order of the vertebrae along the spinal column?

The soil swallowed by the earthworm to form the worm cast is ground up in the

\(\scriptsize 2H_2O \rightarrow 2H_2 + O_{2(g)}\)

The equation above represents a part of the light stage of photosynthesis. Which of the following must be present for this reaction to occur?

After a heavy rainfall and the formation of a large pond, the most likely sequence of changes in the vegetation of the pond is

In which of the following groups of animals is the malpighian tubule found?

The modes of nutrition in Nitrobacter, Ascaris and Homo-sapiens respectively are

The legs and beak of an egret resemble those of the heron because they 

For heterotrophic organisms, competition is least caused by the inadequacy of

A person that is obese must avoid meals containing 

Organisms I, II, III and IV have surface volume ratios of 1:2, 1:3, 1:4 and 1:5 respectively. The organism that is likely to have the most complex transport system is

Plants survive hot dry conditions by

The population density of Tridax in an abandoned square farmland of side 200 m was found to be 5 plants per m². The population size of the plant on the farm is

The role of the Golgi complex in a eukaryotic cell is to

Which of the following is true of cloning?

In an experiment to determine the percentage of air in a soil sample, the following readings were recorded:

• Volume of water in a measuring cylinder = 500 cm³
• Volume of soil added to water  = 350 cm³
• Volume of water and soil after stirring = 800 cm³

The percentage of air in the soil sample is

Which of the following biome could be characterized by very low rainfall, cold nights, hot days and fast blooming plants? 

The primary structure responsible for pumping blood for circulation through the mammalian circulatory system is the

In nature, plants and animals are perpetually engaged in mutualism because

The correct base pairing for DNA is

The behavioural adaptation in social insects could best be described as

The study of how and why population size change overtime is

The components of castor oil seed and the maize grain are similar except for the 

Which of the following diseases is not caused by a virus?

A state in Nigeria that is most susceptible to desert encroachment is 

In Amoeba, osmoregulation is carried out by the