Thinner extension of cytoplasm made of cytoskeleton Component of plankton. Tests made of silica or chitinous plates. Silica test that is fused. Tests accumulate on ocean floor as silica ooze. Pseduopodia for feeding, shell formation and movement.
Symbiotic algae provide nutrients.
Analogous to fungi in that they have filamentous structure to increase surface area for decomposition. Amoebalike cells used for feeding in both phyla. Cytoplasmic streaming moves mass of cells and distributes O 2 and nutrients throughout mass. Brightly colored pigments. Ameobalike cells consume bacteria.