a) What is an age-pyramid? b) Name three representative kinds of age-pyramids for human population and list the characteristics for each one of them.

a) What is an age-pyramid? b) Name three representative kinds of age-p

1.	a) What is an age-pyramid? b) Name three representative kinds of age-pyramids for human population and list the characteristics for each one of them.
Answer» sacred groves : in india religious and cultural traditions stressed on protection of nature vast stretches of forest land were left untouched and all the animal an plant life within tham worshipped such sarcred goves are seen in khasi and jantia hills in Meghalya and aravilli Hills fo rajasthan In megalye the speed groves are last resvoirs fo rate and threatened plants .

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(i) Arrange the following compounds in an increasing order of basic strength : `C_(6)H_(5)NH_(2), C_(6)H_(5)N(CN_(3))_(2), (C_(2)H_(5))_(2)NH and CH_(3)NH_(2)` (ii) Arrange the following compounds in a decreasing order of `pK_(b)` values: `C_(2)H_(5)NH_(2), C_(6)H_(5)NHCH_(3), (C_(2)H_(5))_(2) NH and C_(6)H_(5)NH_(2)`
Rerrange the following in an increasing order of their basic strengths: `C_(6)H_(5)NH_(2),C_(6)H_(5)N(CH_(3))_(2),(C_(6)H_(5))_(2)` NH and `CH_(3)NH_(2)`.
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a) What is an age-pyramid? b) Name three representative kinds of age-pyramids for human population and list the characteristics for each one of them.

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