UTME 2022 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
Which of the following movements occur during exhalation?
A. The diaphragm and intercostal muscles relax
B. The thoracic cavity increases in volume
C. The diaphragm and intercostal muscles contract
D. The diaphragm contracts and the intercostal muscles relax.
Question 2
Which of the following is a plant excretory product?
A. Oil
B. Cytokinin
C. Resin
D. Amino acids.
Question 3
Which of the substances listed below is a trace element for plants?
A. Potassium
B. Sodium
C. Copper
D. Phosphate
Question 4
In a bakery, yeast is added to flour to make bread rise. This is possible because yeast produces
A. alcohol
B. oxygen
C. carbon dioxide
D. ethanol.
Question 5
Pawpaw seeds, collected from a tree with many desirable agronomic qualities did not give rise to plants of desirable characters as the parent because
A. seeds are not reliable for propagating plants
B. uncontrolled out-crossing can introduce unwanted variability
C. vegetative propagation is the best form of reproduction for all crops
D. seeds were not physiologically mature at harvest.
Question 6
In a drought situation, plants suffer from water stress which could result in
A. reduced biochemical activities
B. enhanced chemical activities
C. enhanced microbial activities
D. reduced phototropic activities.
Question 7
Which of these food chains is NOT possible in a forest?
A. Diatom → fly → toad → snake
B. Fly → toad → snake → hawk
C. Leaves → caterpillar → bird → lion
D. Leaves → goat → man → lion
Question 8
After a meal of yam has been digested, the highest concentration of glucose is to be found in the
A. hepatic artery
B. pulmonary vein
C. hepatic portal vein
D. posterior vena cava
Question 9
The structure that is common in the embryos of mammals, amphibians, birds, fishes and reptiles and which is an evidence of their common ancestry is the
A. eye
B. chorion
C. allantois
D. gill-slits.
Question 10
Excess water in plants is excreted as water vapour and droplets respectively through
A. respiration and guttation
B. transpiration and guttation
C. photosynthesis and guttation
D. guttation and condensation
Question 11
The main function of the petal of a flower is to
A. attract pollination agents
B. protect the flower while still in bud
C. serve as landing stage for insects
D. protect the inner pairs from desiccation.
Question 12
The radicle of a bean seedling grows most rapidly in the region
A. of the root tip
B. just above the root tip
C. just around the root tip
D. just below the root tip.
Question 13
Milk can be pasteurized by
A. the addition of common salt
B. boiling for one hour
C. heating to \( 75^{\circ} \mathrm{C} \) for 20 minutes
D. the addition of vinegar.
Question 14
If a healthy potted plant is continuously kept in dim light -
A. the rate of respiration may equal that of photosynthesis
B. more carbon dioxide and water are taken in
C. respiration may be halted
D. the volume of oxygen released increases.
Question 15
In an experiment to estimate the volume of air in a soil sample using a measuring cylinder, it was found that: Initial volume of water \( =\mathrm{p} \mathrm{cm}^{3} \) Volume of soil before mixing with water \( =\mathrm{q} \mathrm{cm}^{3} \) Final volume of water after adding soil \( =r \mathrm{~cm}^{3} \) From the data above, which of the following deductions is correct?
A. \( r=p+q \)
B. \( r>p+q \)
C. \( q=r-p \)
D. \( r

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