WAEC Biology 2017 Past Questions

(a) A child belongs to blood group 0 and the mother be-longs to group B. With the aid of genetic cross, state the possible blood groups of the father.

(b) (i) Name two forms of adaptive communication in animals

(ii) State two reasons why organisms communicate with one an-other.

Theory

Question 5

An example of osmosis in plants is the

A.movement of water through the xylem
B.loss of water vapour from the stomata
C.translocation of food through the phloem
D.absorption of water from the soil by the root

Objective

Question 5

(a) Explain briefly the process of perceiving smell in humans.

(b) State the adaptive features of the egg of a domestic fowl

(c) (i) What are autotrophs?
(ii) Name two unicellular organisms that are autotrophs

(d) State five functions of the World Health Organisation

(e) Name two example each of plants and animals that live in a freshwater pond.

(f) In the table below, state five differences between the skin of a mammal and the epidermis of a leaf.

(g) A farmer has two plots of land; plots A and B. on Plot A the farmer planted several seeds of maize. On plot B, the farmer planted several seeds of maize and pepper in a small area. What type of competition would be observed on
(i) Plot A
(ii) Plot B

Theory

Question 6

The organism that can carry out both autotropic and heterotrophic modes of nutritions is

A.Chlamydomonas
B.Eudorina
C.Euglena
D.Spirogyra

Objective

Question 7

The diagram above illustrates a part of the human skeleton. It represents the bones of the

A.upper arm
B.lower arm
C.upper leg
D.lower leg

Objective

Question 8

Which of the labelled parts of the diagram of the part of the human skeleton articulates with the head of the trochlea to form a hinge joint?

A.I
B.II
C.III
D.IV

Objective

Question 9

The diagram above illustrates a part of the human skeleton. The labelled part that provides surface for the attachment of the triceps is

A.I
B.II
C.III
D.IV

Objective

Question 10

The diagram above illustrates the transverse section of a

A.dicotyledonous root
B.monocotyledonous root
C.dicotyledonous stem
D.monocotyledonous stem

Objective

Question 11

Which of the following actions does not occur during exhalation in man?

A.Thoracic cavity decreases in volume
B.Diaphragm flattens
C.Ribs move down and in
D.Air pressure increases in the thoracic cavity

Objective

Question 12

The diagram above is an illustration of the urinary tubule in a mammal. Which of the following substances is found in the part labelled II only?

A.Lipid
B.Glucose
C.Urea
D.Uric acid

Objective

Question 13

The diagram above is an illustration of the urinary tubule in a mammal. The part which contains lowest concentration of urea is labelled

A.I
B.II
C.III
D.IV

Objective

Question 14

The diagram above is an illustration of the urinary tubule in a mammal. Which of the following substances is greater in concentration in the part labelled IV when compared to that part labelled I?

A.Lipid
B.Glucose
C.Urea
D.Uric acid

Objective

Question 15

Deamination of amino acids in the liver produces

A.blood sugar
B.glycogen
C.bile
D.urea

Objective

Question 16

Which of the following glands also serves as an exocrine gland?

A.Ovary
B.Pancreas
C.Adrenal
D.Thyroid

Objective

Question 17

Which of the following sequences is the correct route of the transmission of impulses along a reflex arc?

A.\(Receptor\to sensory neuron \to synapse \to intermediate neuron \to synapse \to motor neuron \to effector\)
B.\(Receptor \to motor neuron \to synapse \to intermediate neuron \to synapse \to sensory neuron \to effector\)
C.\(Effector \to intermediate neuron \to synapse \to motor neuron \to synapse \to sensory neuron \to receptor\)
D.\(Effector \to motor neuron \to synapse \to sensory neuron \to synapse \to intermediate neuron \to receptor\)

Objective

Question 18

When viewing an object that is close to the human eye, the

A.eye lens becomes thin
B.ciliary muscles relax
C.suspensory lens become taut
D.eye lens becomes fat

Objective

Question 19

The diagram above is an illustration of the human sperm. The part labelled I is the

A.acrosome
B.nucleus
C.mitochondrion
D.tail

Objective

Question 20

In the diagram of the human sperm above, the function of the part labelled II is to

A.fuse the ovum during fertilization
B.generate the energy for the sperm to swim to the fallopian tube
C.help the sperm to swim forward
D.dissolve the membrane of the egg during fertilization

Objective

Question 21

Which of the following types of placentation is not common amongst syncarpous pistils?

A.Marginal
B.Axile
C.Parietal
D.Free central

Objective

Question 22

The complex energy-rich organic matter which living organisms need for life is

A.water
B.air
C.food
D.mineral salts

Objective

Question 23

Which of the following processes are associated with photosynthesis? I. Energy from sunlight is absorbed II. Carbon dioxide is evolved III. Oxygen is given off IV. Glucose is synthesized

A.I and II only
B.I, II and IV only
C.I, III and IV only
D.I, II, III and IV

Objective

Question 24

Which of the following function is associated with calcium in plants? Formation of

A.cell wall
B.ribosomes
C.proteins
D.cell membrane

Objective

Question 25

The diagram above shows the dentition of an organism. What organism is this?

A.rabbit
B.cat
C.frog
D.man

Objective

Question 26

The diagrams below show the dentition of an organism. The function of the teeth labelled X is for

A.biting and grasping
B.chewing and grinding
C.tearing and grasping
D.chewing and tearing

Objective

Question 27

The teeth which are absent in the young of the organism whose dentition is shown above is labelled

A.W
B.X
C.Y
D.Z

Objective

Question 28

The number of individuals that the environment can support over a long period of time is its

A.growth rate
B.total capacity
C.population capacity
D.carrying capacity

Objective

Question 29

A good site for secondary succession would be

A.a sand dune
B.a bare rock
C.a land that has just had forest fire
D.a stretch of barren land

Objective

Question 30

A population which exceeds its carrying capacity and then collapses is represented graphically by a

A.bell-shaped curve
B.linear curve
C.sigmoid curve
D.skewed curve

Objective

Question 31

The natural dwelling place of an organism is called its

A.ecological niche
B.habitat
C.population
D.environment

Objective

Question 32

Which of the following ecological factors will result in food shortage?

A.Drought
B.Low rate of reproduction
C.Emigration
D.Topography

Objective

Question 33

Soil permeability refers to

A.how easily water passes through the soil
B.the proportion of air in the soil
C.the proportion of water the soil holds
D.how well water rises up the soil

Objective

Question 34

Which of the following groups of organisms do not have members that can be called autotrophs?

A.Protists
B.Mosses
C.Chlorophyta
D.Fungi

Objective

Question 35

Which of the following pyramids gives the most accurate picture of the relationships between at the various trophic levels in a food chain? A pyramid of

A.numbers
B.energy
C.biomass
D.size

Objective

Question 36

Which of the following statements is not associated with pyramids of energy?

A.Efficiency of energy transfer between trophic levels can be studied
B.Comparisons of pyramids for different ecosystems can be made
C.More accurate comparisons of trophic levels
D.Representation of numbers of organisms at different trophic levels

Objective

Question 37

Which of the following materials is not easily biodegradable?

A.Polythene bag
B.Cotton bag
C.Hides and Skin bag
D.Paper bag

Objective

Question 38

Which of the following pairs of organisms is in a mutualistic relationship?

A.Hydra and Sea anemone
B.Hermit crab and Sea anemone
C.Dodder plant and Cocoa plant
D.Mistletoe and Kolanut

Objective

Question 39

The establishment of game reserves and parks is a method of

A.conserving natural resources
B.cultivating game
C.controlling pollution
D.cultural awareness

Objective

Question 40

Which of the following practices is not used in conserving water?

A.Afforestation
B.Damming
C.Deforestation
D.Reforestation

Objective

Question 41

Which of the following resources cannot be renewed?

A.Air
B.Petroleum
C.Food crop
D.Soil

Objective

Question 42

The type of variation illustrated above is

A.continuous variation
B.discontinuous variation
C.morphological variation
D.environmental variation

Objective

Question 43

Which of the following characters is not a morphological variation?

A.shape of the nose
B.colour of skin
C.colour of hair
D.tongue rolling

Objective

Question 44

An apple plant can produce sexually and asexually and it has 40 chromosomes in its leaf cells. How many chromosomes would be in each gamete and somatic cell?

A.20 chromosomes in the gametes and 10 in the somatic cells
B.40 chromosomes in the gametes and 20 in the somatic cells
C.20 chromosomes in the gametes and 40 in the somatic cells
D.40 chromosomes in the gametes and 40 in the somatic cells

Objective

Question 45

Assuming that A is the gene for normal skin colour and is dominant, while a is the gene for albinism and its recessive, what is the likely genotype of the couple which had 50% normal and 50% albino offspring?

A.AA, aa
B.Aa, aa
C.AA, Aa
D.Aa, Aa

Objective