Nowadays, it was known that many single-celled animals survived freezing just fine, and without having to retreat to deepnesses.

Stein's scientific work focused on invertebrates, and mainly on Diptera, as well as single-celled animals.

The malaria parasite, a single-celled animal known as a protozoan, belongs to a higher order of complexity.

She carefully dragged a wire loup through the colony of single-celled animals.

"The only single-celled animal affected by the viral drug was B. meresgerii," Margo continued slowly.

These are of two main kinds: algae known as diatoms, and flagellates, which have many of the qualities of single-celled animals.

Are you saying that anything so huge is a single-celled animal?

Many were protozoans, single-celled animals larger and more structurally complex than bacteria.

It is interesting because it is a single-celled animal large enough to be seen with a naked eye.

Some single-celled animals have a light-sensitive spot with a little pigment screen behind it.