Tag: biology

• The simple protists were similar to bacteria but they gradually evolved as eukaryotes wherein each cell is having a nucleus. 
• They are not an animal, plant or fungus but they may be closely related to plants. 
• They may survive alone or may group as per the convenience.
• The correct answer is D. 

• Zootermopsis, the pine woods termite, contains vast numbers of the wood engulfing symbiont Trichonympha, along with a number of other species, such as the primitive flagellate, Streblomastix and Trichomonas, a genus commonly found in warm, moist interiors of virtual all species of animals. 
• Trichonympha along with these huge cells are bacteria residing in the termite gut assist in breaking down the cellulose. Hence the correct option is D.

Water collecting canals around the contractile vacuole are called Radiating canals The contractile vacuole is the part that contracts and forces extra water out of the cell. The radiating canals are the paths to the contractile vacuole. In Paramecium, these are two contractile vacuoles while one in Amoeba.

Entamoeba histolytica secretes proteolytic enzyme called Histolysin.

• The movement of protists is affected by various surrounding factors,  certain protists move by special locomotive structures. 
• Ciliated cells and flagellated cells move faster than others, but the flagellated cells are able to move as fast as 2.0 mm/sec.
• The correct answer is B.

Protista are eukaryotic organism. They have well defined membrane bound nucleus, which encloses genetic material and membrane bound cell organelle in cytoplasm.