What term includes all the biotic and abiotic elements in an area?
a)ecosystem
b. population
c. biome
d. organ

A)ecosystem - this is true! an ecosystem includes both living and non-living objects in a system!
b. population - this is only biotic: a population is a group of organisms, and organisms are biotic
c. biome - this is also only biotic: it's a large community of plants and animals over a large area
d. organ - this would be only biotic (parts of living organism)

Both prokaryotic and eukaryotic cells have ribosomes and cell membranes