Question

Who classified plants on the basis of their water requirement into three ecological groups?

Answer 1

The living organisms react with their environments and they bear full impression of the environments in which they grow.

In order to withstand adverse conditions of the environment and utilize to their maximum benefit the nutrients and other conditions prevailing therein, the organisms develop certain morphological, anatomical, physiological and reproductive features.

Any feature of an organism or its part which enables it to exist under conditions of its habitat is called adaptation. Every organism develops certain adaptations and so does the population or a community. The completion of life cycle of an organism or stabilization of a community results through a series of adaptations which have survival value.

(1) Plants of acidic soil (Oxylophytes)

(2) Plants of saline soil (Halophytes

3) Plants growing on the sand (Psammophytes)