Question

what is mean by food chain​

Answer 1

All the animals are indirectly depend on each other for their meal . For their survival each animal eat their prey i.e other animal.this actually forms a chain for an ex a deer eats a grass a deer is eaten by cheetah whereas so and so

Answer 2

Answer:

a series of organisms in which each creature eats the one below it in the series and becomes a source of food for the organisms above it

Explanation:

The food chain's length is a continuous variable that provides a measure of the passage of energy and an index of ecological structure that increases in value counting progressively through the linkages in a linear fashion from the lowest to the highest trophic (feeding) levels.

Food chains are often used in ecological modeling (such as a three species food chain). They are simplified abstractions of real food webs, but complex in their dynamics and mathematical implications.

Ecologists have formulated and tested hypotheses regarding the nature of ecological patterns associated with food chain length, such as increasing length increasing with ecosystem size, reduction of energy at each successive level, or the proposition that long food chain lengths are unstable.Food chain studies have an important role in ecotoxicology studies tracing the pathways and biomagnification of environmental contaminants

Producers, such as plants, are organisms that utilize solar or chemical energy to synthesize starch. All food chains must start with a producer. In the deep sea, food chains centered on hydrothermal vents and cold seeps exist in the absence of sunlight. Chemosynthetic bacteria and archaea use hydrogen sulfide and methane from hydrothermal vents and cold seeps as an energy source (just as plants use sunlight) to produce carbohydrates; they form the base of the food chain. Consumers are organisms that eat other organisms. All organisms in a food chain, except the first organism, are consumers.[citation needed]

In a food chain, there is also reliable energy transfer through each stage[how?]. However, all the energy at one stage of the chain is not absorbed by the organism at the next stage. The amount of energy from one stage to another decreases.