Predation NEET Questions

Biology - Ecology and Environment

Predation MCQ Questions


7.
Biological control methods adopted in agricultural pest control are based on the ability of:
A.
Pesticides to kill pests
B.
Soil microbes to enrich soil
C.
Predator to regulate prey population
D.
Plants to produce toxins
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ANSWER :
C. Predator to regulate prey population
8.
Why do exotic species become invasive when introduced to new geographical areas?
A.
They have higher mutation rates
B.
They have no natural predators in the new habitat
C.
They reproduce faster than native species
D.
They are genetically modified
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ANSWER :
B. They have no natural predators in the new habitat
9.
In the rocky intertidal communities of the American Pacific Coast, the important predator is:
A.
Cactoblastis
B.
Pisaster
C.
Chathamalus
D.
Balanus
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ANSWER :
B. Pisaster
10.
When starfish (Pisaster) were experimentally removed from an intertidal area, what happened?
A.
There was no observable change
B.
Algal population decreased drastically
C.
All starfish came back within a year
D.
More than 10 species of invertebrates became extinct within a year
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ANSWER :
D. More than 10 species of invertebrates became extinct within a year
11.
The extinction of invertebrate species after starfish removal demonstrates that predators help in:
A.
Decreasing biodiversity
B.
Eliminating weaker species
C.
Maintaining species diversity by reducing competition among prey
D.
Increasing competition among prey
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ANSWER :
C. Maintaining species diversity by reducing competition among prey
12.
Cryptic colouration in insects and frogs serves as a defense against:
A.
Competitors
B.
Parasites
C.
Predators
D.
UV radiation
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ANSWER :
C. Predators