Vertical distribution of different species occupying
different levels in a biotic community is known as:

In a ring girdled plant:

The chromosomes in which centromere is situated
close to one end are:

The structures that are formed by stacking of
organized flattened membranous sacs in the
chloroplasts are :

Which of the following cells during gametogenesis
is normally dipoid?

Which of the following characteristics is mainly
responsible for diversification of insects on land ?