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Organisms And Populations

Question
CBSEENBI12002130
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Following are the responses of different animals to various abiotic factors. Describe each one with the help of an example.
(i) Regulate
(ii) Conform
(iii) Migrate
(iv) Suspend

Solution

Regulate: Some organisms are able to maintain homeostasis by regulating their body temperatures. The mechanisms used by most mammals to regulate their body temperature are similar to what we humans use.

Eg: Body temperature remains constant at 370C. In summer, when outside temperature is more than our body temperature, we sweat profusely and when the temperature is much lower than 370C, we shiver thus body temperature remains constant.

(ii) Conform :Many animals, cannot maintain a constant internal environment. Their body temperature changes with the ambient temperature. These are conformers. Heat loss or heat gain is a function of
surface area. Since small animals have a larger surface area relative to their volume, they tend to lose body heat very fast when it is cold outside. Eg. Shrews and hummingbirds.

(iii) Migrate: The organism can move away temporarily from the stressful habitat to a more hospitable area & return when stressful period is over.
Eg: Every winter, the famous Keoladeo National Park in Bharatpur host thousands of migratory birds coming from Siberia & other northern regions.

(iv) Suspend: In animals, if migration is not possible, they might avoid the stress by escaping in time.
Eg: (1) Bears go into hibernation during winter.
(2) Fishes go into aestivation to avoid summer related problems heat & desiccation.

Some More Questions From Organisms and Populations Chapter

To live in groups is beneficial because :

Ants give information to their companions :

Population density is denoted by the symbol

The number of births during a given period in the
population that are added to the initial density is 

 :

The departure of a individual from a population is called :

In which interaction only one species is benefitted while the other species is neither harmed nor benefitted ?

Which of the following interaction both species suffer ?

In which of the following interaction both species are benefitted ?

Fill in the blanks with suitable words :

1. The optimal capacity of the organism to produce offspring is called........................

2. Rapid increase in human population is called........................

3. Mathematical expression of the growth of population is called........................

4. Yeast cells grown in a culture medium show........................growth curve.

5. Main cause of population explosion is........................

State true or false :

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