2009 - WAEC Biology Past Questions & Answers - page 1

1
A group of closely related organisms capable of interbreeding to produce fertile offspring are known as members of a
A
kingdom
B
class
C
family
D
species
CORRECT OPTION: d
2
Viruses are economically important because they
A
do not have cell structures
B
can only reproduce inside living cells.
C
cause diseases in plants and animals
D
exist as crystals outside living cells
CORRECT OPTION: c
3
A beaker of pond water containing few specimens of Euglena was placed in a dark room for two weeks. At the end of this period, the specimens of Euglena were still alive because they were
A
able to carry out holozoic nutrition.
B
able to carry out photosynthesis using carbon dioxide in the pond water
C
better adapted to life in darkness than to life in light
D
not overcrowded
CORRECT OPTION: a
4
The cytoplasm of the cell is considered a very important component because it
A
regulates the amount of energy in the cell
B
suspends all cell organelles.
C
is the outermost part of the cell
D
is solely responsible for cell division
CORRECT OPTION: b
5
After an hour, the level of water in the thistle funnel will
A
rise
B
fall
C
remain the same
D
double
CORRECT OPTION: a
6
The experiment above is used to demonstrate the process of
A
transpiration
B
water culture
C
diffusion
D
osmosis
CORRECT OPTION: d
7
In plant cells the role of the membrane is played by the
A
nucleolus
B
cell wall
C
cytoplasm
D
mitochondrion
CORRECT OPTION: b
8
Red blood cells were found to have burst open after being placed in distilled water for an hour. This phenomenon is known as
A
plasmolysis
B
diffusion
C
haemolysis
D
wilting
CORRECT OPTION: c
9
The curvature movement of plants in response to the stimulus of water is called
A
hydrotropism
B
geotropism
C
phototropism
D
thigmotropism
CORRECT OPTION: a
10
Two organelles directly involved in mitotic cell division are
A
nucleus and mitochondrion
B
ribosome and nucleus.
C
centriole and Golgi apparatus
D
nucleus and centriole
CORRECT OPTION: d
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