Paramecium live in aquatic environments, usually in stagnant, warm water. The species Paramecium bursaria forms symbiotic relationships with green algae. The algae live in its cytoplasm. Algal photosynthesis provides a food source for Paramecium.

Paramecium lives in fresh water. The excess water it takes in via osmosis is collected into two contractile vacuoles, one at each end, which swell and expel water through an opening in the cell membrane. The sweeping motion of the hair-like cilia helps the single-celled organism move.

A paramecium is a small one celled (unicellular) living organism that can move, digest food, and reproduce. They belong to the kingdom of Protista, which is a group (family) of similar living micro-organisms. Micro-organism means they are a very small living cell.

Specimens of colorless Paramecium multimicronucleatum were found to respond to visible light. The photodispersal seems to be caused mainly by the step-up photophobic response exhibited by the specimens at the dark-light border. The photokinetic responses enhance the degree of the photodispersal.

A cytostome (from cyto-, cell and stome-, mouth) or cell mouth is a part of a cell specialized for phagocytosis, usually in the form of a microtubule-supported funnel or groove. Food is directed into the cytostome, and sealed into vacuoles.

: the point especially if permanently identifiable at which waste is discharged from the protozoan body.

Answer: The anal orifice (cell “anus”) found in certain structurally complex protozoa, such as the rumen-dwelling ciliates of herbivores, through which waste matter is ejected. So cytopage is present there .

Cilia have important functions in the life of Paramecium, such as locomotion through the surrounding water and ingestion of food into the cytostome (see Wichterman, 1985). The cilia responsible for the ingestion of food are mainly localized in the gullet, which is a funnelshaped depression of the cell surface.

Paramecium consists of two types of vacuoles: contractile vacuole and food vacuole. Contractile vacuole: There are two contractile vacuoles present close to the dorsal side, one on each end of the body.

In Paramecium locomotion mainly occurs by movement of cilia. It can move forward and backward. While moving forward, cilia strongly move from anterior to posterior. Similarly, for backward movement cilia strongly move from posterior to anterior.

Paramecia feed on microorganisms like bacteria, algae, and yeasts. To gather food, the Paramecium makes movements with cilia to sweep prey organisms, along with some water, through the oral groove (vestibulum, or vestibule), and into the cell.

A euglena moves by whipping, twisting, turning its flagellum around like that of a propeller. The locomotory flagellum is equal to the length of the Euglenoid’s body and it highly helps it to swim freely in water.

flagellum

Euglena live in fresh and brackish water habitats such as ponds rich in organic matter. Some species can form green or red “blooms” in ponds or lakes.

Euglena reproduce asexually by means of longitudinal cell division, in which they divide down their length, and several species produce dormant cysts that can withstand drying.