Assertion: There is a little diversity at the poles.
Reason: Environmental conditions are unfavourable for the organisms at the poles.

Assertion: The biological diversity is unchangeable with the change in latitude. Reason: Environmental conditions are favourable in speciation.

Assertion: The Environmental conditions of the tropics are favourable for speciation and diversity of organisms. Reason: The climate seasons, temperature, humidity and photoperiod are more or less stable and congenial

Assertion: The environmental conditions of the tropics are favourable for speciation and diversity of organisms. Reason: The climate, seasons, temperature, humidity and photoperiod are more or less stable and congenial.

Assertion: Temperature values are maximum at the equator and decreases towards the poles. Reason:Vegetation is same from the equator to the poles.

Assertion: Archaebacteria are most resistant to adverse environmental conditions. Reason: In archaebacteria, cell wall and cell membrane are highly complex.

Assertion: Archaebacteria are most resistant to adverse environmental conditions. Reason: In archaebacteria, cell wall and cell membrane are highly complex.

Adaptations in organisms to cope with extreme environmental conditions include