WAEC 2025 Biology | Objective

Prepare for your exams with WAEC questions? Reviewing past/model questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2025 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1 View Details
The Genus into which man is classified is
A. chordata
B. mammalia
Correct C. homo
D. sapiens

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 2 View Details
DIAGRAM - D1
The diagram sown is an illustration of the nymph of an insect. Study it and answer question. 2 and 3.
The organism illustrated is a stage in the
A. grasshopper
B. mosquito
C. termite
Correct D. cockroach

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 3 View Details
DIAGRAM - D1
The diagram shown is an illustration of the nymph of an insect. Study it and answer question. 2 and 3.
The growth process that would occur in the organism before it becomes an adult is
A. respiration
B. locomotion
Correct C. moulting
D. sensitivity

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 4 View Details
DIAGRAM - D2
The diagram shown is an illustration of a dicot leaf. Study it and answer question 4 and 5
The parts labelled I, II, III and IV respectively are
A. vein, apex, midrib, stalk
B. midrib, petiole, margin, stalk
C. apex, lamina, blade, axil
Correct D. apex, midrib, lamina, axil

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 5 View Details
DIAGRAM - D2
The diagram shown is an illustration of a dicot leaf. Study it and answer question 4 and 5
The part that contains the phloem and xylem is labelled
A. I
Correct B. II
C. III
D. IV

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 6 View Details
The functions of vacuoles in plants are storage and
A. protection
B. strength
Correct C. support
D. sensitivity

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 7 View Details
DATA - D3
Four cells each with osmotic potential of about 3\% salt solution were immersed respectively into solutions of different concentrations as follows: 1-1\% salt solution II-3\% salt solution III - 6\% salt solution IV - 10\% salt solution
Which of the solutions would cause an increase in osmotic pressure within the coil
Correct A. I
B. II
C. III
D. IV

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 8 View Details
DATA - D3
Four cells each with osmotic potential of about 3\% salt solution were immersed respectively into solutions of different concentrations as follows: 1-1\% salt solution II-3\% salt solution III - 6\% salt solution IV - 10\% salt solution
If the cells are plant cells, what would happen to the cell in solution III? it would become
A. turgid
B. crenated
C. haemolysed
Correct D. plasmolyzed

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 9 View Details
How many molecules of oxygen are required for the aerobic respiration of three molecules of glucose
A. 3
B. 6
C. 12
Correct D. 18

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 10 View Details
Sclerenchyma tissues in plants is for
A. water conduction
Correct B. mechanical support
C. food storage
D. food transport

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 11 View Details
DIAGRAM - D4
The diagram shown is an illustration of a cell carrying out a biological process. Study it and answer question 11 and 12
The process is refereed to as
Correct A. phagocytosis
B. pinocytosis
C. endocytosis
D. exocytosis

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 12 View Details
DIAGRAM - D4
The diagram shown is an illustration of a cell carrying out a biological process. Study it and answer question 11 and 12
The biological system that contains cells that carry out the illustrated biological process in humans is
A. reproduction
Correct B. circulatory
C. respiratory
D. nervous

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 13 View Details
Which of the following statements is not correct about respiration in plants
A. it occurs in all plant tissues
Correct B. light and chlorophyll must be present for it to occur
C. energy is produced as the end product
D. it occurs in the presence of oxygen

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 14 View Details
Urine when compared with blood in mammals is hypertonic because
A. urine contains high percentage of all cells
B. all traces of sugar have been removed from urine
C. urea is actively secreted into the renal tubules
Correct D. much water has been removed from urine

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 15 View Details
The naturally produced auxin in plants is
Correct A. indole acetic acid
B. dichlorophenoxyacetic acid
C. aldone
D. florigen.

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 16 View Details
The sympathetic nervous system causes
Correct A. constriction of the arteries
B. heartbeat to slow down
C. increase in the secretion of saliva
D. contraction of the bladder

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 17 View Details
Long sightedness could be corrected using a
A. biconvex lens
Correct B. convex lens
C. biconcave lens
D. concave lens

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 18 View Details
During the process of hearing in mammals the structure in the middle ear which receives the first vibration is the
A. oval window
B. round window
C. incus
Correct D. malleus

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 19 View Details
An important characteristic of fruits dispersed by water is the presence of
Correct A. fibrous covering
B. smooth surface
C. water content
D. pericarp

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 20 View Details
Plants which grow and produce fruits within a year are called
A. biennials
B. perennials
Correct C. annuals
D. herbs

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 21 View Details
Chemical digestion in organisms is the
A. breakdown of starch into carbohydrates
Correct B. breakdown of complex molecules into simple molecules
C. build up of simple insoluble molecules
D. build up of simple soluble molecules into complex insoluble molecules

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 22 View Details
Excessive bleeding from an injury could be due to the lack of vitamin
Correct A. K
B. E
C. B
D. A

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 23 View Details
DIAGRAM - D5
The diagram is an illustration of a system in humans. Study it and answer question 23 and 24
The enzymatic digestion of protein begins in the part labelled
Correct A. I
B. II
C. III
D. IV

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 24 View Details
DIAGRAM - D5
The diagram is an illustration of a system in humans. Study it and answer question 23 and 24
The parts that secrete substances involved in the digestion of fats are labelled
A. I, II and III
B. I and III
C. II and III
Correct D. I, III and IV

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 25 View Details
If the small intestine of an organism does not have villi, the organism will have a problem with
A. digestion of food only
B. absorption of water
Correct C. absorption of nutrients only
D. digestion of food and absorption of nutrients

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Help others prepare! Share this practice hub:
Chat with Support