A. is a microscopic single cell organism. b. It has a ,rounded and dense nucleus and a number of small bubble-like
c. It can constantly change its own
d. They have many finger like projections called to capture their food.
e. The trapped food is caught in the and is egested as waste and thrown out of it.
f. Assimilation is the process by which the use of substances to build substances required by the is called assimilation.