Biology

The percentage of nitrogen gas in the Earth's atmosphere is approximately:

Which of these is a biotic component of a pond ecosystem?

Which of the following is NOT a greenhouse gas?

Animals that depend on other animals for food are called:

The gradual change in species composition in a given area is called:

Vulture and hyena are examples of:

Which of the following is a threat to biodiversity?

Acid rain is mainly caused by the oxides of:

Which part of Nepal is famous for One-horned Rhinoceros?

The term 'Ecology' was first coined by:

A food chain always starts with:

The living components of an ecosystem are called:

The 10% law of energy transfer in a food chain was given by:

If 1000 J of energy is present at the producer level, how much energy will be available to the secondary consumer?

Which of the following represents a correct parasitic relationship?

In an ecosystem, the flow of energy is always:

Which of the following is the 'climax community' in a typical forest succession?

What is the role of Nitrosomonas bacteria in the Nitrogen Cycle?

Identify the relationship where both species benefit from each other.

Which ecological pyramid can never be inverted in a natural ecosystem?