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CBSE Class 12-science Answered

what is adaptive radiation? does it refer to  power of adaptation in an individual to a variety of environments or evoluion of species from a common ancestor or adaptations due to geographical isolations?
Asked by imtiyazmulla68 | 30 Mar, 2018, 09:34: PM
answered-by-expert Expert Answer
Adaptive radiation is the evolutionary process in which different species starting from a common point in a geographical area radiate to other geographical areas. It is due to the evolution of a species and is specifically due to convergent evolution.
 
In convergent evolution multiple organism shares (converge) common environment and thus to survive, it changes the morphology or shows analogous organs. In adaptive radiation, organism leaves its habitat and move to a new environment. So if more than one organism leave their respective niche and arrive at a new and common environment, they have to adapt to the environment and evolve, showing convergence after radiation
Answered by Sivanand Patnaik | 30 Mar, 2018, 11:41: PM

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CBSE 12-science - Biology
what is adaptive radiation? does it refer to  power of adaptation in an individual to a variety of environments or evoluion of species from a common ancestor or adaptations due to geographical isolations?
Asked by imtiyazmulla68 | 30 Mar, 2018, 09:34: PM
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CBSE 12-science - Biology
Mention the role of pioneer species in primary succession on rocks. 
Asked by Topperlearning User | 19 Sep, 2016, 06:06: AM
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CBSE 12-science - Biology
The climax stage is achieved quickly in secondary succession as compared to primary succession. Why?
Asked by Topperlearning User | 19 Sep, 2016, 06:07: AM
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CBSE 12-science - Biology
Mention one similarity between hydrarch and xerarch successions.
Asked by Topperlearning User | 13 Jun, 2014, 04:48: PM
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CBSE 12-science - Biology
What are seral communities?
Asked by Topperlearning User | 13 Jun, 2014, 04:48: PM
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CBSE 12-science - Biology
Why nutrient cycles in nature are called biogeochemical cycles?
Asked by Topperlearning User | 19 Sep, 2016, 06:06: AM
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CBSE 12-science - Biology
The gradual and predictable change in the species composition of a given area is called ecological succession. What do you understand with the pioneer and climax communities in this context? 
Asked by Topperlearning User | 19 Sep, 2016, 06:06: AM
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CBSE 12-science - Biology
Name the pioneer and the climax species in a water body. Mention the changes observed in the biomass and biodiversity of the successive seral communities developing in the water body.  
Asked by Topperlearning User | 13 Jun, 2014, 04:48: PM
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CBSE 12-science - Biology
Why is secondary succession faster than primary succession?
Asked by Topperlearning User | 13 Jun, 2014, 04:48: PM
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CBSE 12-science - Biology
Explain the function of ‘reservoir’ in a nutrient cycle. List the two types of nutrient cycles in nature.
Asked by Topperlearning User | 13 Jun, 2014, 04:48: PM
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