Identify the possible link “$A$” in the following food chain.

Plant $→$ Insect $→$ Frog $→$ “$A$” $→$ Eagle

Given below is a list of autotrophs and heterotrophs. With your knowledge about food chain, establish various linkages between the organisms on the principle of ‘eating and being eaten’. What is this inter-linkage established known as ?

Algae, hydrilla, grasshopper, rat, squirrel, crow, maize plant, deer, rabbit, lizard, wolf, snake, peacock, phytoplankton, crustaceans, whale, tiger, lion, sparrow, duck, crane, cockroach, spider, toad, fish, leopard, elephant, goat, nymphae, spirogyra.

The order of organism in an aquatic food chain is

The food chain which begin with dead organic matter is called

Water plants provide ....... to water animals

Which of the following statement is not correct about energy flow in an ecosystem?