42.
If a marine fish is placed in a fresh water aquarium, will the fish be able to survive ? Why or why not ?
The marine fish are adapted to high salt concentration and if kept in fresh water they cannot regulate the water entering their body. The body of a marine fish has high concentration as compared to fresh water and so water enters the fish's body through endosmosis and may lead to bursting of cells and death of the fish. Thus marine water fishes cannot survive in fresh water.
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43.
Define phenotypic adaptation. Give one example.
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44.
Most living organisms cannot survive at temperature at about 45°C. How are some microbes able to live in habitats with temperatures exceeding 100°C ?
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Long Answer Type
45.
List the attributes that populations possess but not the individuals.
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46.
If the population growing exponentially doubles in size in 3 years, what is the intrinsic rate of increase (r) of the population?
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47.
Name important defence mechanisms in plants against herhivory.
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Short Answer Type
48.
An orchid plant is growing on the branch of mango tree. How do you describe this interaction between the orchid and the mango tree ?
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49.
What is the ecological principle behind the biological control method of managing with pest insect ?
Short Answer Type
Long Answer Type
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