Amoeba and spyrogyra are both members of the protista kingdom.
Amoeba are single-celled microscopic living organisms that mainly live in water. Amoeba reproduce asexually by a process called binary fission. Amoeba feed on algae and bacteria. Cytoplasm engulfs the food source into a food vacuole where enzymes digest it. Respiration in amoeba is carried out by simple diffusion of oxygen and carbon dioxide between the amoeba's cytoplasm and the surrounding water.
Spyrogyra is a filamentous algae commonly found in water. Spyrogyra contain chlorophyll and utilize photosynthesis to make food. Spyrogyra's structure consists of chain-like long strands of cells. Each cell has a nucleus, cytoplasm, and chloroplast. Reproduction takes place asexually through fragmentation or sexually through a process called conjugation.