Question

What is the source of energy in our ecosystem?

Answer 1

Answer:

1.  B

2.  A

Explanation:

The energy from the sun is tapped by the autrotrophs through photosynthesis. These autotrophs are then preyed on by higher organisms in the food chain such as primary consumers - like rabbits. Primary consumers are then preyed on by secondary consumers like cheetars. Secondary consumers are then preyed on by tertiary consumers like vultures. Therefore, there is a transfer of energy from the sun up the food chain/web.

Without autrotrophs most organisms in the the food chain would not exist. This is why autotrophs  are at the bottom of the energy pyramid. There are, however, inefficiencies in the transfer of this energy up the food chain. Only 10% of the energy is passed to the next upper level (and turned into biomass) because most of the energy is lost  mostly in form of heat.