2010 - WAEC Biology Past Questions and Answers - page 3
21
The part labelled III is the
A
albumen
B
chalaza
C
yolk
D
air space
correct option: b
Users' Answers & Comments22
Which of the following statements ls true about transpiration? It is the
A
loss of water in the form of vapour from the surface of the’ leaf
B
loss of water in the form of vapour from the surface of the root
C
absorption of water in the form of vapour from the body of the pint
D
movement of water through the body of the plant.
correct option: a
Users' Answers & Comments23
Transportation of water in the xylem tissue involves the following except
A
root pressure
B
capillary action
C
transpiration pull
D
translocation
correct option: d
Users' Answers & Comments24
The following are the major reasons why the butterfly lays eggs under the surface of a leaf except to
A
shade the eggs from the direct rays of the sun.
B
protect the eggs from predators
C
protect the eggs from being washed away by rain drops
D
camouflage the eggs
correct option: d
Users' Answers & Comments25
In which of the following organic compounds is the hydrogen-oxygen ratio equal to 2:1?
A
Proteins
B
Carbohydrates
C
Lipids
D
Vitamins
correct option: b
Users' Answers & Comments26
A man suffering from obesity must avoid meals containing
A
margarine and butter
B
rice and beans
C
carrots and oranges
D
beef and fish
correct option: a
Users' Answers & Comments27
In testing for starch in a leaf, the leaf is first boiled in water for about a minute so that the
A
cell walls are hardened
B
cells are killed
C
chlorophyll is dissolved out
D
iodine will penetrate
correct option: b
Users' Answers & Comments28
Which of the following food substances is incorrectly linked to its enzyme?
A
Protein - trypsin
B
Fat - lipase
C
Sucrose - pepsin
D
Starch - amylase
correct option: c
Users' Answers & Comments29
Which of the following pH values is the best for the action of the enzymes - renin and pepsin in the
stomach?
stomach?
A
pH2
B
pH7
C
pH8
D
pH9
correct option: a
Users' Answers & Comments30
The bacterium in a mutualistic association with legumes converts
A
nitrates to ammonia
B
ammonium compounds to nitrites
C
nitrogen gas to ammonia
D
nitrites to nitrates
correct option: d
Users' Answers & Comments