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11.
An association between two organisms where both members benefit is known as ___
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A.
symbiosis.
B.
commensalism.
C.
ammensalism.
D.
mutualism.
E.
saprophytism.

12.
An instrument used in measuring the speed of wind is
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A.
a barometer
B.
a wind gauge
C.
a wind vane
D.
an anemometer
E.
a hydrometer.

13.
At times hyenas feed on remains of animals killed by other animals. At other times, hyenas themselves kill animals for food. Therefore hyenas may best be described as ----
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A.
scavengers and herbivores
B.
scavengers and parasites
C.
scavengers and predators
D.
herbivores and predators
E.
herbivores and parasites

14.
Autecology is defined as the study of interrelationship of
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A.
many species of organisms and their environment
B.
same species of organisms and their environment.
C.
organisms in the atmosphere.
D.
organisms under the earth's surface.
E.
None of the above.

15.
Autotrophs are also described as ----
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A.
Consumers
B.
Decomposers
C.
Carnivores
D.
Producers
E.
Herbivores

16.
If three 30cm lengths of glass tubing are tightly packed with clay, sand and loamy soils respectively and then stood in a beaker of water for one week the level of water will be
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A.
Lowest in the tube with clay
B.
The same in all the tubes
C.
Lowest in the tube with loamy soil
D.
Highest in the tube with sandy soil
E.
Lowest in the tube with sandy soil

17.
In a community bacteria and fungi are referred to as ----
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A.
producers
B.
consumers
C.
scavengers
D.
tertiary consumers
E.
decomposers

18.
Puddles, Ponds, Rivers, Seas and Oceans are grouped together as ----
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A.
Ecosystem
B.
Biosphere
C.
Aquatic habitat
D.
Terrestrial habitat
E.
Marine environment

19.
The feeding pattern in an ecosystem is called_______
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A.
Pyramid of energy
B.
Food web
C.
Food chain
D.
Pyramid of member
E.
Ecology

20.
The orderly changes that occur slowly and naturally in plant and animal communities in a given area over a period of time until a stable community is established is called ----
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A.
Transformational change
B.
ecological succession.
C.
survival of the fittest.
D.
weather change
E.
environmental change.

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