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20
MCQ (Single Correct Answer)

Which one of the following organisms reproduces sexually only once in its life time?

A

Banana plant

B

Mango

C

Tomato

D

Eucalyptus

21

Species that can tolerate narrow range of temperature are called.........

Explanation

Stenothermal Organisms

Temperature, a major abiotic factor affects the metabolism, activity and so many other physiological functions of the organism.

On the basis of temperature tolerance, organism can be classified as eurythermal and stenothermal.

(i) Eurythermal organisms can tolerate and thrive in a wide range of temperatures.

(ii) Stenothermal organisms tolerate only a narrow range of temperatures.

22

What are eurythermic species?

Explanation

Eurythermic species are those species which possess or show a wide range of temperature tolerance.

23

Species that can tolerate wide range of salinity are called...........

Explanation

Euryhaline species

Water, another major abiotic component affects the life of organism. The quality of water like pH , salinity (salt concentration) are water related problems faced by aquatic organisms, organisms or species that can tolerate wide range of salinity are regarded as euryhaline Species.

24

Define stenohaline species.

Explanation

Stenohaline species are those species which show a narrow range of salinity tolerance.