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Biology WAEC / WASSCE 1989 Nutrition in Plants & Animals (Photosynthesis & Food Substances)
An association between living organisms in which one lives on and feeds at the expense of the other organism is known as
A
parasitism
B
commensalism
C
mutualism
D
symbiosis
E
predation
medium Difficulty
Biology WAEC / WASSCE 1989 Basic Ecological Concepts, Ecosystems & Biomes
Which of the following statements is not correct about food chains?
A
All food chains start with a green plant
B
Food chains involve feeding relationships among organisms
C
horter food chains indicate more effective utilization of energy than longer ones
D
There is no energy loss in a food chain
E
All food chains have primary consumers.
medium Difficulty
Biology WAEC / WASSCE 1989 Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Which of the following characteristics is associated with commensalism?
A
Both organisms are harmful to each other
B
The association involves many organisms
C
The association is beneficial to one of the organisms
D
Both species are beneficial to each other
E
This relationship is found only among higher plants
medium Difficulty
Biology WAEC / WASSCE 1989 Variety of Organisms & Classification of Living Things
Maize is best stored against insect attack
A
on raised platforms
B
in fumigated silos
C
in a sunny area
D
while still on the cob
E
in humid metal tanks
medium Difficulty
Biology WAEC / WASSCE 1989 Population Ecology, Habitats & Conservation
Which of the following is not an effect of overcrowding on a population?
A
Death
B
Competition
C
Commensalism
D
Aggression
E
Cannibalism
medium Difficulty
Biology WAEC / WASSCE 1989 Population Ecology, Habitats & Conservation
The term used in describing the effective management of national resources by man is
A
preservation
B
utilization
C
economics
D
development
E
conservation
medium Difficulty
Biology WAEC / WASSCE 1989 Basic Ecological Concepts, Ecosystems & Biomes
Breathing roots are characteristic structures of plants growing in
A
mangrove swamp
B
desert
C
shrub biome
D
savannah
E
tropical rain forest
medium Difficulty
Biology WAEC / WASSCE 1989 Cell Structure, Organization & Cell Division
At which of the following stages of cell division can the cell be said to be resting
A
Anaphase
B
Telophase
C
Prophase
D
interphase
E
Metaphase
medium Difficulty
Biology WAEC / WASSCE 1989 Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Which of the following statements is not correct about the ecological effects of agricultural activities?
A
The use of herbicides and pesticides in farms can cause pollution
B
Bush-burning encourages desertification
C
Excessive use of fertilizers in farms may have harmful effects
D
Tillage of tropical soils with ploughs and harrows may encourage erosion
E
Monocropping is one of the cultural methods of controlling pests.
medium Difficulty
Biology WAEC / WASSCE 1989 Basic Ecological Concepts, Ecosystems & Biomes
Pests can be controlled without the subsequent danger of polluting the ecosystem by
A
introducing a population of species similar to that of the pest
B
increasing the population of the natural enemies of the pest
C
eliminating the natural enemies of the pest
D
keeping the population of natural enemies of the pest constant
E
spraying the ecosystem with pesticide
medium Difficulty
Biology WAEC / WASSCE 1989 Basic Ecological Concepts, Ecosystems & Biomes
The activities of an organism which affect the survival of another organism in a habitat can be described as
A
biotic factors
B
climatic factors
C
physiographic factors
D
edaphic factors
E
abiotic factors
medium Difficulty
Biology WAEC / WASSCE 1989 Basic Ecological Concepts, Ecosystems & Biomes
Which of the following. groups of organisms feeds directly on green plants?
A
Producer
B
Decomposer
C
Primary consumer
D
Secondary consumer
E
Tertiary consumer
medium Difficulty
Biology WAEC / WASSCE 1989 Variety of Organisms & Classification of Living Things
Which of the following methods is used in food preservation for a long period?
A
adding oil to food
B
Exposing food to fresh air
C
keeping the food in a store
D
Warming the food daily
E
Salting and drying the food
medium Difficulty
Biology WAEC / WASSCE 1989 Variation & Genetics (Heredity)
Which of the following represents the phenotypic ratio, when a plant Rr is crossed with another plant Rr, assuming that the gene R for round seed is dominant and wrinkled r is recessive?
A
1:2:1
B
2:2:1
C
3:2
D
3:1
E
4:1
medium Difficulty
Biology WAEC / WASSCE 1989 Cell Structure, Organization & Cell Division
All hereditary characters in a cell are passed on from parent-cell to daughter-cell through the process of
A
mitosis
B
meiosis
C
fertilization
D
implantation
E
gestation
medium Difficulty
Page 1749 of 1989