1. Struggle among the members of guppy fish for feeding on mosquito larvae
2. I Struggle between snakes and owls for capturing rats for eating
3. Struggle within a group of deer for feeding on grass at the same location
4. Struggle between tigers in a jungle for preying on deer

1. Struggle for existence
2. Origin of variation
3. Inheritance of acquired characters
4. Natural selection

1. Chimpanzee
2. Cockroach
3. Peacock
4. Honeybee

1. Newspaper
2. Faecal matters of animals
3. Rotten leaves
4. Chlorinated insecticide

1. Biosphere Reserve, Sanctuary, National Park, National Park
2. National Park, National Park, Biosphere Reserve, Sanctuary
3. National Park, National Park, Sanctuary, Biosphere Reserve
4. Sanctuary, Biosphere Reserve, National Park, Sanctuary

1. Tuberculosis
2. Asthma
3. Malaria
4. Dengue

By the influence of  ____ hormone the hairs on the skin get erected in emergency situations.

A chromosome is the condensed coiled structure of ____ molecule.

The sexual reproduction that occurs among two genotypically different organisms belonging to the same species, is called ____.

____ was the aggregate of some large colloidal molecules during the early phase of the origin of life.

____ is derived from the root of the Sarpagandha plant which is used as medicine for lowering high blood pressure.

The ex-situ conservation by keeping sample seeds in liquid nitrogen at a temperature of -196°C is called ____.