Question

Q.12 Give reasons:
(1) Energy flow through an ecosystem is one
Ans (1) Sun is the ultimate source of energy​

Answer 1

Answer:

I suppose that these are 2 different give reasons

1.So, the energy that is captured by the producers does not revert back to the Sun and the energy transferred to the herbivores does not come back to the producers. It just keeps on moving to the next trophic level in a unidirectional way. That is why the flow of energy in the food chain is always unidirectional/one way.

2.The Sun is an infinite (at least in terms of human time scales) and renewable source of energy which is also by far the most important source of energy for us. Primary productivity (photosynthesis) is driven by sunlight and all our fossil fuels are derived from plants which existed millions of years ago.