All living things have an ability to respond to their environment, that is also called stimulation.

Correct Option: C

All living things have an ability to respond to their environment, that is also called stimulation.

There are several factors and processes which differentiate living beings from nonliving beings like reproducction, respiration, growth, etc. But among them reproduction is the only difference which differentiates living being from non-living beings without any exception.

Correct Option: B

There are several factors and processes which differentiate living beings from nonliving beings like reproducction, respiration, growth, etc. But among them reproduction is the only difference which differentiates living being from non-living beings without any exception.

Biological organisms starts with submicroscopic moleculer level like viruses, bacteria etc. These organisms are unable to be seen by naked eyes without the help of microscope or even electron microscope.

Correct Option: D

Biological organisms starts with submicroscopic moleculer level like viruses, bacteria etc. These organisms are unable to be seen by naked eyes without the help of microscope or even electron microscope.

Angiosperms have adapted themselves to all kinds of habitat - terrestial, aquatic, tropical, deciduous and alpine. Self pollination is seen in very few angiosperms. Production of large number of seeds ensure that at least some will germinate. Not all plants have been domesticated by man.

Correct Option: A

Angiosperms have adapted themselves to all kinds of habitat - terrestial, aquatic, tropical, deciduous and alpine. Self pollination is seen in very few angiosperms. Production of large number of seeds ensure that at least some will germinate. Not all plants have been domesticated by man.

Basal metabolic rate is inversely proportional to body size. So smaller animals have a higher metabolic rate. Hence production of energy is more.

Correct Option: B

Basal metabolic rate is inversely proportional to body size. So smaller animals have a higher metabolic rate. Hence production of energy is more.