Characteristics of Ecosystem

Q. Assertion: A network of food chain existing together in an ecosystem is known as a food web
Reason: An animals like kite cannot be a part of a food web.

1. If both assertion and reason are true and the reason is the correct explanation of the assertion.
2. If both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. If the assertion is a true statement, but the reason is false.
4. If both assertion and reason are false statements.

Q.

What is the significance of a food chain. Give 3 reasons.

Q. Trophic level of an organism is its ________.

1. Axis around earth
2. Energy level in a food web
3. Stage in a food chain
4. Stage in an ecological niche

Q.

Who made the first law of thermodynamics?

Q. What is biological magnification? Will the levels of this magnification be different at different levels of the ecosystem?

Q. In the figure given alongside, the various trophic levels are shown in the form of a pyramid. At which trophic level the maximum energy is available?
(a) T4
(b) T2
(c) T1
(d) T3
Figure

Q. Food chains are long and involved, with at least seven or eight trophic levels

1. True
2. False