50 Hot Biology Questions for JAMB

50 Hot Biology Questions for JAMB 2026

Are you wondering what JAMB will set in Biology for 2026? These 50 hot questions and key points cover the most frequently tested topics in JAMB Biology. This guide is perfect for last-minute revision and ensures you stay ahead of your peers.

Note: These points are not arranged topic by topic. You can also check out JAMB Chemistry Key Pointsand 1000+ Physics Questions for a complete JAMB science prep.

Top 50 JAMB Biology Key Points

Possession of four limbs, countershading, and long tails are adaptive features for arboreal life.
Nitrobacter converts nitrites to nitrates; Azotobacter is a nitrifying bacteria.
Number of offspring produced from mitotic division = Two.
Large vacuoles are absent in animal cells but present in plant cells; plant cells also have chloroplasts and cell walls. Chromosomes occur in both.
Energy released during cellular respiration is stored as Adenosine Triphosphate (ATP).
At the end of mitosis, the number of cells produced = Four.
During inspiration, the diaphragm contracts and flattens while rib muscles contract, raising the ribs.
Each kidney is connected to the bladder by a ureter.

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Structural similarities in Paramecium and Euglena include anterior and posterior ends.
Oxygen released during photosynthesis comes from water.
Long necks and legs of giraffes were used as evidence in Lamarck’s theory of evolution.
The pancreas secretes insulin to regulate excess sugar in the blood.
Anemometer measures wind speed.
Mitochondrion is the site of ATP production.
Dry weight of an organism is measured after all water is removed – the most accurate measure of organic mass.
Amoeba moves using pseudopodia (“false feet”).
Soil permeability refers to how easily water passes through soil.
Water cycle processes include evaporation, condensation, and precipitation.
Sahel savanna is in the drier northern regions of Nigeria, northeast of Sudan savanna.
Earthworm has a hydrostatic skeleton.

Genes determine characters in living organisms.
Phytoplankton has the highest biomass in aquatic food chains.
Hierarchy of plant evolution: Schizophyta → Thallophyta → Bryophyta → Pteridophyta → Spermatophyta.
Gestation is the period from zygote formation to birth.
Binary fission is common to both Paramecium and Amoeba.
Pancreas secretes insulin to regulate blood sugar.
Plasmodium requires host cells to survive; it is not free-living.
Green plants are the producers in terrestrial food chains.
Neurons receiving stimuli from receptors are called sensory neurons.
The cerebrum controls voluntary movement and interpretation of stimuli.
Pupils contract when moving from dark to bright light.
Water makes up ~77.5% of protoplasm in living organisms.
Wildlife conservation prevents elimination of endangered species.
Human sex is determined by differences in X and Y chromosomes in males.
Semicircular canals in the ear are responsible for balance.
Chorion is the outer layer surrounding embryo and yolk sac.
There are several types of fingerprints; which is absent can be tested in exams.
Stomata open and close by osmosis.
Hermaphrodites possess both male and female reproductive organs.
Abiotic factors like floods and earthquakes influence human population.
Clay soil retains the most water.
Drosophila melanogaster is widely used to study chromosome inheritance.
Mitochondria store energy in the cell.
Inbreeding involves crossing individuals of the same species over generations.
Phloem transports manufactured food from leaves to other plant parts.
Fossil records require carbon dating to demonstrate evolution.
Melanin gives skin, hair, and eyes their color; produced by melanocytes.
Tissue is a group of similar cells performing a specific function.
Four-chambered hearts are characteristic of mammals.
Morphological variation refers to visible physical differences among individuals of the same species.
Retina is the light-sensitive part of the eye.
Population size varies due to natality, mortality, immigration, and emigration.
Nucleus controls all life activities in a cell.
Amoeba, Paramecium, and Chlamydomonas are cellular-level organisms.
Pollination is the transfer of pollen grains from the anther to the stigma of a flower.