Environmental Science (333) | NIOS FREE SOLVED ASSIGNMENTS (2020-21) | TMA-20-21-ENGLISH MEDIUM

 


ENVIRONMENTAL SCIENCE (333)

NIOS SOLVED ASSIGNMENTS (2020-21)   

 1. Answer any one of the following questions in about 40-60 words.

 (a) Name the discovery that enabled the primitive humans to colonise colder parts of the earth. Mention one more advantage that primitive humans derived from the discovery.

 Answer: - The name of that discovery is Fire, due to which primitive man was able to live in a colony on relatively cold parts of the earth. Apart from this, primitive humans got another benefit from this discovery. The tools, tools prepared by primitive humans used to hunt animals for food in exterminating wild animals and stone from the fossilized spot of Australopithex in Africa. Tools have also been found.

 2. (a) Why is there a need to be develop a buffer or transtional zone around a natural ecosystem?

 Answer: - There is a need to create intermediate or intertidal zones around natural ecosystems because due to human misuse of natural ecosystems, biodiversity and wildlife have become a threat. The increasing human population, its increasing needs and greed are the root causes of the destruction of any natural ecosystems.  

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