Which region is associated with the lower limb?

Iwill give brainiest to first person who gets it ! what are 3 basic types of interactions we see in an ecosystem?

How did the miller-urey experiment impact the way scientists think about the origins of life? use what you know about the miller-urey experiments to discuss the factors needed for life to arise, and speculate on whether life could arise on another planet.

An easy way to calculate the amount of energy available at each level is to what?