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Biology WAEC / WASSCE 2009 Basic Ecological Concepts, Ecosystems & Biomes
P → Q → R → S → T he organism designated P in the food chain above is normally sustained by energy from
A
sunlight
B
carbohydrates
C
green plants
D
mineral salts.
medium Difficulty
Biology WAEC / WASSCE 2009 Basic Ecological Concepts, Ecosystems & Biomes
P → Q → R → S → T Which of the following statements best describes the organism designated R? It
A
feeds on S
B
is a primary consumer
C
is a producer as well as a consumer
D
is a secondary consumer
medium Difficulty
Biology WAEC / WASSCE 2009 Basic Ecological Concepts, Ecosystems & Biomes
Food chains are relatively short because
A
of energy recycling in the ecosystem
B
energy gain at each trophic level is high.
C
of energy loss at each trophic level
D
energy flow in an ecosystem is uni-directional.
medium Difficulty
Biology WAEC / WASSCE 2009 Variety of Organisms & Classification of Living Things
which of the following organisms does not show colour adaptation to its environment?
A
Chameleon
B
Earthworm
C
Fish
D
Toad
medium Difficulty
Biology WAEC / WASSCE 2009 Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Most tropical plants shed their leaves during dry weather conditions in order to
A
reduce their growth rate.
B
conserve water
C
reduce competition
D
minimize the rate of photosynthesis
medium Difficulty
Biology WAEC / WASSCE 2009 Basic Ecological Concepts, Ecosystems & Biomes
Which of the following features is not an adaptation of plants to aquatic habitat?
A
Breathing roots for entry of air
B
Flowers raised above water for the purpose of pollination
C
Spongy tissues containing gases for buoyancy
D
Hairy structures on the leaves to reduce water loss
medium Difficulty
Biology WAEC / WASSCE 2009 Variety of Organisms & Classification of Living Things
The following habitats can be used in the study of succession except
A
savanna grassland
B
abandoned farmland.
C
a pond
D
a well cultivated land
medium Difficulty
Biology WAEC / WASSCE 2009 Population Ecology, Habitats & Conservation
Population growth rate may be defined as the
A
ortality rate per unit area over a period
B
number of times an organism occurs within a given period
C
number of a particular species per unit area
D
net rate of natality and mortality in the habitat over a period.
medium Difficulty
Biology WAEC / WASSCE 2009 Population Ecology, Habitats & Conservation
In ecological succession, since Iichens grow on bare rock, they are considered to be
A
primary consumers
B
pioneer organisms
C
climax organisms
D
producers
medium Difficulty
Biology WAEC / WASSCE 2009 Population Ecology, Habitats & Conservation
Which of the following factors will most likely lead to overcrowding within a population?
A
Absence of predators
B
Emigration
C
Food shortage
D
Absence of territorial behaviour
medium Difficulty
Biology WAEC / WASSCE 2009 Variety of Organisms & Classification of Living Things
A species whose populations has become so small that it may become extinct if not protected is a/an
A
special species
B
dangerous species
C
endangered species
D
important species
medium Difficulty
Biology WAEC / WASSCE 2009 Population Ecology, Habitats & Conservation
Which of the following practices does not contribute to the preservation and improvement of the environment?
A
Pollution reduction
B
Material recycling
C
Reforestation
D
Overgrazing
medium Difficulty
Biology WAEC / WASSCE 2009 Variation & Genetics (Heredity)
Variation is important in human life and can be used for the following activities except
A
crime detection
B
population distribution
C
blood transfusion
D
determination of paternity
medium Difficulty
Biology WAEC / WASSCE 2009 Variation & Genetics (Heredity)
An example of continuous variation is
A
fingerprint
B
tongue rolling
C
blood grouping
D
body size
medium Difficulty
Biology WAEC / WASSCE 2009 Variation & Genetics (Heredity)
The outward appearance or an organism is referred to as
A
phenotype
B
genotype
C
dominance
D
recessiveness
medium Difficulty
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