General Science

Rhizobium is a group of bacteria which live in the roots of some plants. They fix nitrogen for plant and get food in return. This relationship is:

In a food chain, which type of organisms utilizes most of the sun energy coming to earth?

In an ecosystem, the energy flow is always

The study of relationship between organisms and their environment is called:

Oxygen is released during:

Carbon dioxide is released during:

The gas responsible for global warming is mainly:

Animals that eat plants are called:

Organisms that produce their own food are:

A food chain always starts with:

In a food chain, snake is usually a:

Energy is highest at the:

Energy pyramid is broad at the:

Parasitism is a type of:

A leech on skin is an example of:

Butterfly and flower relationship is:

Carnivorous plants get nitrogen from:

Removal of forests is called:

Burning of fossil fuels increases:

A predator hunts and eats: