A structure has these features: It is inside a prokaryotic cell.
It's a very small circular DNA fragment.
It is separate from an organism's actual chromosomes.

What structure is this?

a) telomere
b) nucleus
c) chromatid
d) plasmid

the actual answer was 160934

producers within ecosystems are essential as they are at the base of the food chain. plants are examples of producers. they use the process of photosynthesis to capture light energy and use it to convert simple inorganic substances (carbon dioxide and water) into organic substances (glucose).