Question

Grazing Food Chain and Food Chain of pond

Answer 1

Explanation:

1)grazing food chain is a food chain in which the energy in the lowest trophic level is derived from photosynthesis

2)In a freshwater aquatic ecosystem like a pond, the organisms in the food chain include algae, small animals, insects and their larvae, small fish, big fish and a fish-eating bird or animal (Figure 8.4). A food chain always begins with producers. Herbivores (plant-eaters) come next in the chain.

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Answer 2

Answer:

Explanation:

(i) Food chain is a linkage of organisms within an

ecosystem, in which each link feeds on the one

before it and is fed on by the one after it.

(ii) Only the first link in the chain is a producer and

all the rest are consumers.

(iii) In the ecosystem, the energy is transferred from

one organism to another with food, in a definite

sequence.

(iv) Initially, solar energy is absorbed by producers

and with the help of photosynthesis the food is

synthesized.

(v) Energy gets transferred from producers to

consumers of different levels.

(vi) Decomposers derive energy from dead organisms

by decomposition from all levels.

(viii) The flow of energy is unidirectional