2013 - WAEC Biology Past Questions and Answers - page 3
21
The process by which plants manufacture food from carbon dioxide and water using energy from the sun is called
A
chemosynthesis
B
photosynthesis
C
anabolism
D
catabolism
correct option: b
Users' Answers & Comments22
Conduction of water and mineral salts through the xylem vessels is enhanced because the xylem cells are
A
thickened with lignin
B
long, narrow tubes placed end to end
C
close to the endodermis
D
centrally placed in the roots
correct option: b
Users' Answers & Comments23
Which of the following factors is likely to increase the rate of transpiration in plants?
A
A reduction in the number of stomata per unit surface area
B
Increase in humidity around the leaves of plants
C
An increase in leaf surface area to volume ratio
D
Removal of leaves from plant
correct option: c
Users' Answers & Comments24
The name of the enzyme that catalyses the conversion of glucose to glucose-6-phosphate at the beginning of glycolysis is
A
phospho-fructokinase
B
glucose isomerase
C
hexokinase
D
glucose-6-kinase
correct option: c
Users' Answers & Comments25
The correct arrangement of food classes of the same quantity in the order of magnitude of energy value in animals in descending order is
A
Carbohydrates, fats and oils, water, protein
B
Fats and oils, carbohydrates, protein, water
C
Water, fats and oils, carbohydrates, protein
D
Protein, fats and oils water and carbohydrates
correct option: b
Users' Answers & Comments26
Which of the following substances is not complex carbohydrate?
A
Glycogen
B
Cellulose
C
Starch
D
Glucose
correct option: d
Users' Answers & Comments27
Which of the following associations is an example of epiphytism?
A
Lice in the human hair
B
Mistletoe on citus fruit.
C
Egret on cow
D
Fern on palm tree
correct option: d
Users' Answers & Comments28
Ecology simply means the study of
A
particular species of plants and animals
B
the interrelationship between orgganisms and their environment
C
the properties of a habitat
D
the interrelationship between plants and animals
correct option: b
Users' Answers & Comments29
The maximum size of a population that a given area can support is known as
A
population density
B
carrying capacity
C
population growth
D
maximum population
correct option: b
Users' Answers & Comments30
The producers in a food chain in an aquatic environment are
A
birds
B
phytoplankton
C
zooplankton
D
fishes
correct option: b
Users' Answers & Comments