An organism that is killed and eaten by another is what

a predator or a scavenger

Explanation:

A true predator can be thought of as one which both kills and eats another animal, but many animals act as both predator and scavenger. A predator is an animal that hunts, catches, and eats other animals.

Scavenger. Animals that consume the carcasses of other animals that have been killed by predators. Decomposers.

prokaryotic cells do not have a nucleus in which the dna is stored in, it floats freely inside the cell.

eukaryote cells do have a nucleus in which the dna is stored in.

i have to report this, it doesn't relate to biology