Questions

Biogeochemical cycles are crucial to ecosystem function because ::

1. Chemical elements are available in only limited amounts and must be recycled.

2. Nutrients and other life-sustaining molecules are in limited supply and must be continually recycled.

The first Indian woman President of Indian National Congress was Sarojini Naidu in the year 1925.

First woman to become the president of INC - Annie Besant 1917.

AOL Time Warner (USA) reported an annual net loss of $98.7 billion on 30 January 2003.

Tubes that bifurcate from the windpipe are called Bronchi.

The simplest organic compounds contain only the elements carbon and hydrogen, and are called hydrocarbons.

Here all the given options are hydrocarbons.

RNA - ribonucleic acid is a type of nucleic acid. The sugar contained in it is called Ribose.

A chromatid is one copy of a newly copied chromosome which is still joined to the original chromosome by a single centromere.

The two identical copies—each forming one half of the replicated chromosome are called chromatids.

Chromonema is the fibre-like structure in prophase in the primary stage of DNA condensation. In metaphase, they are called chromatids.