Which organisms belong to the second and fourth trophic level ?
Rats, Grass , Snake, Eagle.

The second trophic level in a lake is-

In this food chain, the organism which belongs to the second trophic level is....

Productivity at the second trophic level is always

Mark the odd one (w.r.t second trophic level)

What will happen if we kill all the organisms in one trophic level ?

Animals which occupy the same trophic level

Will the impact of removing all the organisms in a trophic level be different from different trophic levels? Can the organisms of any trophic level be removed without causing any damage to the ecosystem?

Organisms which are associated with first as well as third trophic level are

Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?

Study the following statements and select the incorrect ones. (i) Pyramids of energy can never be inverted, since this would violate the laws of thermodynamics. (ii) Pyramids of standing crop and numbers can be inverted since the number of organisms at a time does not indicate the amount of energy flowing through the system. (iii) There are certain limitations of ecological pyramids such as they do not take into account the same species belonging to two or more trophic levels. (iv) Saprophytes are not given any place in ecological pyramids even though they play a vital role in the ecosystem.