WAEC 2023 Biology | Objective

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Question 1 View Details
The ability of organisms to maintain a constant internal environment is known
A. diuresis.
B. endosmosis.
Correct C. homeostasis.
D. plasmolysis.

Correct Answer: C

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Question 2 View Details
DIAGRAM - D1
The diagram shown is an illustration of a mango leaf drawn by a student in a Biology test. The student failed the test.
The likely reason why the student failed the test was that the
A. labels were wrong and the guidelines were not touching the structures.
Correct B. net venation shown were few, rough, not properly drawn and wrongly placed.
C. leaf was too tapered at the apex, the leaf stalk was too short and the shape of leaf was wrong.
D. leaf venation should have been parallel and the midrib should be thicker.

Correct Answer: B

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Question 3 View Details
DIAGRAM - D1
The diagram above is an illustration of a mango leaf drawn by a student in a Biology test. The student failed the test.
Which other features of the diagram, if shown, would have earned the student more marks?
A. colour and size
Correct B. title and magnification
C. habitat and agricultural qualities of leaf
D. spelling of label and length of midrib

Correct Answer: B

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Question 4 View Details
DIAGRAM - D1
The diagrams shown are illustrations of forms in which a particular group of organisms exist.
Which group of organisms is illustrated?
A. Bacteria
B. Viruses
Correct C. Fungi
D. Protozoa

Correct Answer: C

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Question 5 View Details
DIAGRAM - D1
The diagrams above are illustrations of forms in which a particular group of organisms exist.
In which of the illustrated forms does the organism that causes cholera exist?
Correct A. II
B. III
C. IV
D. V

Correct Answer: A

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Question 6 View Details
DATA - T1
Study the list of organisms below and use them to answer questions 6 and 7. I - Hydra II - Owl III - Snake IV - Snail
Arrangement of the organisms in order of increasing complexity is
A. I - II - III - IV.
B. II - III - I - IV.
C. I - IV - II - I.
Correct D. IV - III - II - I.

Correct Answer: D

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Question 7 View Details
DATA - T1
Study the list of organisms below and use them to answer questions 6 and 7. I - Hydra II - Owl III - Snake IV - Snail
The Phylum of the organism labelled IV is
A. Coelenterata.
B. Platyhelminthes.
Correct C. Mollusca.
D. Arthropoda.

Correct Answer: C

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Question 8 View Details
DIAGRAM - D1
The diagram shown is an illustration of a cell in which photosynthesis takes place.
In which of the labelled parts would molecules of water and carbon (IV) oxide combine to form sugar?
A. I
B. II
Correct C. III
D. IV

Correct Answer: C

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Question 9 View Details
DIAGRAM - D1
The diagram shown is an illustration of a cell in which photosynthesis takes place.
The oxygen gas formed in the cell diffuses out of the cytoplasm into the air spaces through the part labelled
A. I.
B. II.
C. III.
Correct D. IV.

Correct Answer: D

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Question 10 View Details
An example of a process that involves osmosis is the
A. movement of digested food from ileum into blood capillaries.
B. translocation of starch from leaves to all parts of a plant.
C. reabsorption of food nutrients from the kidney into blood capillaries.
Correct D. movement of water from root hairs into cortical cell.

Correct Answer: D

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Question 11 View Details
Growth in animals differs from that in plants because growth in
A. plants is intercalary.
Correct B. animals is apical.
C. plants is from within.
D. plants is indefinite.

Correct Answer: B

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Question 12 View Details
DIAGRAM - D1
The diagram shown is an illustration of a structure in the skeletal system of humans.
The illustrated structure is a part of the
A. cervical vertebrae.
Correct B. axial skeleton.
C. axis vertebrae.
D. appendicular skeleton.

Correct Answer: B

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Question 13 View Details
DIAGRAM - D1
The above above is an illustration of a structure in the skeletal system of humans.
An individual was involved in a car accident and the illustrated structure was badly injured. Which of the following structures would most likely be affected?
Correct A. Lumbar, eye and teeth
B. Ear, brain and hinge joint
C. Eye, cerebellum and car
D. Clavicle, tongue and pelvis

Correct Answer: A

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Question 14 View Details
The tricuspid valve is located between the
A. left auricle and left ventricle.
B. right auricle and the superior vena cava.
C. aorta and the left ventricle.
Correct D. right auricle and right ventricle.

Correct Answer: D

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Question 15 View Details
DIAGRAM - D1
The diagram shown is an illustration of some structures used for gaseous exchange in humans. Study it and answer questions 15 and 16
The parts labelled I, II, III and IV respectively are
Correct A. larynx, bronchus, bronchiole and trachea.
B. bronchus, bronchiole, trachea and larynx.
C. bronchiole, trachea, bronchus and larynx.
D. larynx, trachea, bronchiole and bronchus.

Correct Answer: A

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Question 16 View Details
DIAGRAM - D1
The diagram is an illustration of some structures used for gaseous exchange in humans. Study it and answer questions 15 and 16
The part labelled III would be found in the
A. heart.
Correct B. lung.
C. kidney.
D. sternum.

Correct Answer: B

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Question 17 View Details
Which of the following hormones is wrongly paired with its secretory organ?
A. Insulin and pancreas
B. Oestrogen and ovary
C. Oxytocin and hypothalamus
Correct D. Adrenalin and kidney

Correct Answer: D

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Question 18 View Details
The eye defect caused by an uneven curvature of the cornea or lens or both is
A. myopia.
Correct B. astigmatism.
C. presbyopia.
D. hypermetropia.

Correct Answer: B

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Question 19 View Details
The androecium in a flowering plant is a collection of
A. ovules.
Correct B. stamens.
C. filaments.
D. sperms.

Correct Answer: B

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Question 20 View Details
Placentation in fruits is referred to as the
Correct A. part of the ovary where the ovules originate and remain till maturity.
B. formation of a single carpel joined at the two edges of an ovule.
C. arrangement of ovules in the ovary of a flewer.
D. ovules borne on a central column of tissues in an ovary.

Correct Answer: A

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Question 21 View Details
Which of the following processes does not occur during photosynthesis?
Correct A. Carbon (V) oxide is evolved
B. Water is split
C. Oxygen is evolved
D. Energy from sunlight is absorbed

Correct Answer: A

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Question 22 View Details
Stunted growth and small yellow leaves in plants are symptoms of the deficiencies of
A. sulphur.
B. iron.
C. magnesium.
Correct D. nitrogen.

Correct Answer: D

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Question 23 View Details
The structure that its action could result in choking when talking and eating at the same time is
Correct A. epiglottis.
B. oesophagus.
C. liver.
D. stomach.

Correct Answer: A

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Question 24 View Details
The food substance that would produce the highest amount of energy is
A. glucose.
Correct B. fat.
C. amino acid.
D. protein.

Correct Answer: B

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Question 25 View Details
Organisms that feed on dead, decaying tissues of other organisms are known as
A. parasites.
B. autotrophs.
C. heterotrophs.
Correct D. saprophytes.

Correct Answer: D

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