Question

An aquatic food chain comprises of the organisms like tadpoles, weeds, fish and water beetles. The organism which gets the minimum energy through this food chain is (a) water beetles
(b) tadpoles
(c) weeds
(d) fish

Answer 1

Answer:

(Tadpoles)

because they have to get energy for growth

Answer 2

Answer:

Because fish are at the top of the trophic level in an aquatic food web and get the least amount of energy, D is the right answer.

Explanation:

Aquatic food chain -

The food chain that exists in the aquatic ecosystem frequently begins with algae or phytoplankton as producers, followed by zooplankton that feeds on them. Zooplankton is subsequently eaten by small fish and crustaceans, who is eventually devoured by giant fish, sharks, and whales.

The $10%$ % law

Its states that only $10%$ % of the energy stored in a lower trophic level is captured by the next higher trophic level, with the remaining $90%$%wasted in transmission and respiration of the latter.

The amount of energy reduces as the trophic level increases. Because the higher trophic level receives the least amount of energy and the lowest trophic level receives the most energy, the number of trophic levels that an ecosystem can maintain is limited.