UTME 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
One of the functions of the xylem is
A. strengthening the stem
B. manufacturing food
C. reducing loss of water
D. conducting manufactured food
Question 2
The two key cations involved in the action potential of nervous transmissions are
A. \( \mathrm{Na}^{+} and \text{ } \mathrm{Fe}^{2+} \)
B. \( \mathrm{Mg}^{2+} and \text{ } \mathrm{K}^{+} \)
C. \( \mathrm{Na}^{+} and \text{ } \mathrm{K}^{+} \)
D. \( \mathrm{Fe}^{2+} and \text{ } \mathrm{Mg}^{2+} \)
Question 3
Flatworms and roundworms are said to be invertebrates because
A. they are small animals
B. they can live inside the vertebrates
C. some of them are unicellular
D. they have no backbones.
Question 4
From the information above, determine the percentage of water in the given soil sample?
A. 20 %
B. 25 %
C. 40 %
D. 50 %.
Question 5
The movement of part of a plant in response to external stimulus of no particular direction is
A. taxism.
B. tropism.
C. haptotropic movement.
D. nastic movement.
Question 6
The order of evolutionary advancement of the above vertebrates is
A. I, II, III, IV
B. I, IV, III, II
C. II, III, IV, I
D. IV, III, II, I
Question 7
The correct sequence of the movement of urea during urine formation is
A. glomerulus → Bowman's capsule → convoluted tubule → Henle's loop → collecting tubule
B. glomerulus → Bowman's capsule → convoluted tubule → Henle's loop → convoluted tubule → collecting tubule
C. convoluted tubule → glomerulus → Henle's loop → Bowman's capsule → collecting tubule
D. convoluted tubule → Bowman's capsule → Henle's loop → glomerulus → collecting tubule.
Question 8
The villus in the small intestine is significant because it
A. increases the surface area for absorption
B. increases the surface area for digestion
C. assists in mixing digested food
D. assists in filtering undigested food.
Question 9
In demonstrating the importance of mineral elements in plants, the culture bottle must be darkened to
A. prevent algal growth in culture solution
B. allow root growth
C. prevent breakdown of mineral elements
D. prevent photosynthesis in the root.
Question 10
A pollutant that is biodegradable is
A. heavy metals.
B. cellophane.
C. sewage.
D. crude oil.
Question 11
If both parents are heterozygous for a trait, the probability that an offspring will be recessive for that trait is
A. \( \frac{1}{2} \)
B. \( \frac{1}{4} \)
C. 1
D. \( \frac{3}{4} \)
Question 12
The plants that grow in deserts or very dry areas are referred to as
A. hydrophytes.
B. epiphytes.
C. xerophytes.
D. mesophytes.
Question 13
Which of the following is TRUE of the process of conjugation in Paramecium?
A. Micronucleus disintegrates
B. Each ex-conjugant divides only once
C. Macronucleus undergoes division
D. Each micronucleus divides twice.
Question 14
People who suck petrol with their mouths run the risk of increasing in their blood the concentration of
A. iron
B. lead
C. calcium
D. magnesium
Question 15
The sequence of the one-way gaseous exchange mechanism in a fish is
A. mouth → operculum → gills
B. mouth → gills → operculum
C. operculum → gills → mouth
D. gills → operculum → mouth.

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