How do mammals living in colder regions and seals living in polar regions able to reduce the loss of their body heat ?

Animals living in colder region have shorter tail and ears as compared to the animals living in warmer regions. This phenomenon is called

Animals living in colder region have shorter tail and ears as compared to the animals living in warmer regions. This phenomenon is called

How do enzymes catalyse a chemical reaction in the living system ?

CO_2 and H_2 O absorbs strongly in the infrared region and its presence in the atmosphere decreases the loss of heat from the earth by radiation . This global warming is called the greenhouse effect (other gases , including the oxides of nitrogen from car exhaust freons from aerosols and refrigerators and methane from bacteria in the soil and in the rumen cows , also add to the greenhouse effect ). The concentration of atmospheric CO_2 has increased by 10% . The is resulting in the increase in the mean temperature of the earth by 2. 5^@ C , varying form 2^@ C the equator to 4^@ C at the poles . This could have dramatic effects on the climate. Which of the following is growing at a faster rate than CO_2 and thus responsible for the greenhouse effect ?

Shorter body extremities in animals living in colder climate is explained by

Most people living in hilly regions suffer from goitre. Give reason.

Give reasons : Marine life is able to survive in colder regions.

Extremities, tail and ear are relatively shorter in animlas living in cooler regions as compared to those inhabiting warmer zones. This is .

Assertion : Small sized animals are rarely found in polar regions. Reason : Small sized animals have larger surface area relative to their volume and they have to spend much energy to generate body heat through metabolism.

Read the following statements and select the correct option: (a) Very small animals are rarely found in polar regions. (b) Small animals have a larger surface area relative to their volume, they tend to lose body heat very fast when it is cold outside.