Vertical distribution of different species occupyingdifferent levels in a biotic community is known as:
In a ring girdled plant:
The chromosomes in which centromere is situatedclose to one end are:
The structures that are formed by stacking oforganized flattened membranous sacs in thechloroplasts are :
Which of the following cells during gametogenesisis normally dipoid?
Which of the following characteristics is mainlyresponsible for diversification of insects on land ?