Questions

Arati Saha was the first Indian woman to cross English Channel (between England and France) in the year 1959. She was born in 1940 in Kolkata.

The chemical composition of a rock is mainly minerals.

Crystal size in igneous rocks is determined by rate of cooling i.e, the time taken by magma to cool down. 

Hence, the slower the rate of cooling the larger the crystals. The faster the rate of cooling the smaller the crystals.

Amphibians are one of the most sensitive groups to change, whether that is caused by habitat loss, invasive species, disease, trade or climate change. Their sensitivity to environmental threats has been generally linked to the observation that amphibians are characterized by a rather permeable skin. Given their complex life cycles and other traits, amphibians are often recognized as indicators of ecosystem health.

In 1782 Colebrooke was appointed through his father's influence to a writer-ship with the East a India Company in Calcutta.Lord Wellesley appointed him honorary professor of Hindu law and Sanskrit at the college of Fort William.