2014 - WAEC Biology Past Questions and Answers - page 2
11
Which of the following conditions in flowering plants enhance self-pollination?
A
Cleistogamy
B
Heterostyly
C
Protandry
D
Protogyny
correct option: a
Users' Answers & Comments12
The inability to maintain proper balance of the body in humans may be due to a defect in the
A
cochlea
B
Euastachian tube
C
Semi-circular canals
D
oval window
correct option: c
Users' Answers & Comments13
The following substances pass into the blood of the foetus from the mother's blood via the placenta except
A
carbon dioxide
B
glucose
C
viruses
D
antibodies
correct option: c
Users' Answers & Comments14
An inferior ovary of a flower is situated
A
below the floral parts
B
above the floral parts
C
at the same level with all the floral parts
D
at the centre of the floral parts
correct option: a
Users' Answers & Comments15
Older parts of plant roots do not normally absorb water because
A
they lack xylem
B
they have small surface area
C
the phloem is dead
D
they lack root hairs
correct option: d
Users' Answers & Comments16
The amount of starch in a germinating seed decreases because the starch is used up
A
for respiration and building up of cells
B
to build cellulose cell wall
C
to develop meristematic tissues
D
for the production of enzymes
correct option: a
Users' Answers & Comments17
The purpose of treating poor soil with lime is to increase the quantity of
A
nitrogen
B
phosphorus
C
carbohydrates
D
sulphur
correct option: a
Users' Answers & Comments18
A meal consisting of yam and a lot of vegetables is not balanced because it does not contain
A
carbohydrates
B
proteins
C
vitamins
D
minerals
correct option: b
Users' Answers & Comments19
In a Biuret test , some protein was mixed with sodium hydroxide solution. Which of the following chemicals should be added to the mixture for a positive result?
A
mercurous nitrate
B
copper sulphate
C
sodium carbonate
D
silver nitrate
correct option: b
Users' Answers & Comments20
A characteristic feature of plant parasites is the
A
possession of holdfast
B
possession of rhizoids
C
development of hanging roots
D
development of haustoria
correct option: d
A parasitic plant is one that derives some or all of its nutritional requirements from another living plant. All parasitic plants have modified roots, named haustoria (singular: haustorium), which penetrate the host plants, connecting them to the conductive system - either the xylem, the phloem, or both. This provides them with the ability to extract water and nutrient from the hosts. About 4,100 species in approximately 19 families of flowering plants are known.
Users' Answers & Comments