NEET BIOLOGY

Detailed explanation-1: -Many protozoa have a permanent mouth, the cytosome or micropore, through which ingested food passes to become enclosed in food vacuoles. Pinocytosis is a method of ingesting nutrient materials whereby fluid is drawn through small, temporary openings in the body wall.

Detailed explanation-2: -A parasite is an organism that lives on or in a host organism and gets its food from or at the expense of its host. There are three main classes of parasites that can cause disease in humans: protozoa, helminths, and ectoparasites. Entamoeba histolytica is a protozoan.

Detailed explanation-3: -Saprophytic (Sapros = Rotten) or Saprozoic: Some protozoon’s cause disintegration of food materials into smaller molecules outside their body and subsist entirely on the dissolved organic matters. The monosaccharide’s, amino acids and other molecules are absorbed through the body surface.