Shape-Altering Single-Celled Creature

This page is the CodyCross answer for the clue below from Fauna and Flora, Group 171, Puzzle 1 (Common Ancestor).

Question is: Shape-Altering Single-Celled Creature

and the answer is: AMOEBA

Word Meaning:

AMOEBA — (biology) A member of the genus Amoeba of unicellular protozoa that moves by means of temporary projections called pseudopodia.

Definitions from Wiktionary.