Even though jellies can swim, why are they still classified as plankton?

All plant and animal organisms that float or move to a limited extent in water, carried by currents and waves are called plankton.

Explanation:

Jellyfish are on the border of plankton and nekton. They are made of gelatinous tissue in which water makes up 98% of the body's composition. Simple anatomy, they have a single-opening digestive tract and a reticular nervous system.

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.

the answer is c on e2020, bud.