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Organisms And Populations

Question
CBSEENBI12001089
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Distinguish between the following :

(a) Hiberation and aestivation

(b) Ectotherms and endotherms.

Solution
(a) Differences between hibernation and aestivation

Hibernation

Aestivation

1. An inactive/dormant state in animals to escape the harsh conditions of winters, is called hibernation (winter sleep).

2. Example. Bears .

1. An inactive period to escape the harsh conditions of summer is called aestivation (summer sleep).

2. Example. fishes.

(b) Differences between ectotherms and endotherms

Ectotherms

Endotherms

Ectotherms are those animals whose body temperature changes according to the surroundings, in which they are living.
For eg- reptiles

Endotherms are those animals whose body temperature is maintained relatively constant by the process of  homeostasis.

 For eg- Mammals.

Some More Questions From Organisms and Populations Chapter

State true or false :

Coin one word for the following statements :

1.Organism that can tolerate only a narrow range of salinity.

2. Plants that can survive a wide range of temperature.

3. Interaction of two species in which one is benefited while other is neither benefited nor harmed.

4. Number of births during a given period in the population that are added to the initial density.

5. the process of maintaing a constant body temperature.

A few organisms can tolerate and thrive in a wide range of temperature, they are called........................

Majority of organisms are restricted to a narrow range of temperature, such organisms are called ........................ 

The organisms ideally try to maintain the constancy of its internal environment by the process called........................

Mammals from colder climates have shorter ears and limbs to minimize heat loss. This rule is called........................ 

The parasites that feed on external surface of host organisms are called ........................

The parasites that live inside the body at different sites (liver, kidney, lungs, RBC etc.) are called........................

List two negative interactions between two species.

What is the  term for cryptic-colouring in organisms to avoid being detected easily by the predator
?

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