2009 - WAEC Biology Past Questions and Answers - page 3
21
The part of the ear which contains nerve cells sensitive to sound vibrations is the
A
cochlea
B
ampulla
C
tympanum
D
malleus
correct option: a
Users' Answers & Comments22
Spectacles with convex lenses correct long-sightedness by
A
converging the light rays before they enter the eye.
B
diverging the light rays before they enter the eye.
C
reducing light intensity before it enters the eye
D
increasing light intensity before it enters the eye
correct option: a
Users' Answers & Comments23
A seed of a flowering plant can best be described as
A
radicle and plumule
B
the developed ovule
C
the embryo and endosperm
D
developed ovary
correct option: b
Users' Answers & Comments24
Which of the following processes removes carbon from the atmosphere?
A
Putrefaction
B
Photosynthesis
C
Volcanic eruption
D
Burning of fuels
correct option: b
Users' Answers & Comments25
Which of the following cycles involves the process of precipitation and transpiration?
A
Water cycle
B
Carbon cycle
C
Nitrogen cycle
D
Oxygen cycle
correct option: a
Users' Answers & Comments26
The mesophyll layer of a leaf consists of
A
wax and cutin
B
cells with lignified walls
C
irregularly shaped collenchyma cells.
D
photosynthetic parenchyma cells.
correct option: d
Users' Answers & Comments27
Which of the following treatments would increase the rate of transpiration in a potted plant?
A
Placing it in a cold room
B
Placing it under a fan in a room
C
Putting it in a cupboard
D
Smearing grease on the lower surface of the leaves
correct option: b
Users' Answers & Comments28
Pepsin is secreted as an inactive precursor called pepsinogen because
A
pepsin as an enzyme is quickly destroyed by the alkaline food from the mouth
B
. all digestive enzymes pass through a precursor stage
C
pepsin is a proteolytic enzyme and might attack the stomach tissues
D
pepsin is not required in large quantities
correct option: b
Users' Answers & Comments29
An organism whose source of carbon is inorganic is likely to be a/an
A
heterotrophic organism
B
autotrophic organism
C
symbiotic organism
D
parasitic organism
correct option: b
Users' Answers & Comments30
Which of the following organisms is an endoparasite?
A
Mice
B
Mosquito
C
Ascaris
D
Dodder
correct option: c
Users' Answers & Comments