Question:

Entamoeba differs from Amoeba in not having

Updated On: Jul 5, 2022
  • nucleus
  • pseudopodia
  • contractile vacuole
  • ectoplasm
Hide Solution
collegedunia
Verified By Collegedunia

The Correct Option is C

Solution and Explanation

Contractile vacuole is absent in Entamoeba because the medium around it (in host's colon) is isotgpic to its cytoplasm, so there is no need of osmoregulation. Amoeba which lives in freshwater has contractile vacuole. Since freshwater is hyptotonic to cytoplasm of Amoeba, there is continuous endosomosis or inflow of water into the body. Also, some water is added to the cytoplasm from food vacuole and from catabolic reactions. If all this water is allowed to accumulate, the body will soon swell up and burst. So all freshwater protozoan including Amoeba possess contractile vacuole to eliminate excess water from the body which is known as osmoregulation. Pseudopodia are present in trophic form of Entamoeba.
Was this answer helpful?
0
0

Concepts Used:

Common Diseases in Human Beings

Any adverse variation from an organism's normal structural or functional condition is usually associated with specific signs and symptoms and distinct from physical injury.

  • Acute Disease

A few diseases appear out of nowhere and persist only a few days. Acute diseases, such as the common cold, are examples of them. Acute diseases frequently become chronic if they are not treated.

Acute diseases include strep throat, fractured bones, appendicitis, influenza, pneumonia, and others.

  • Symptoms and Treatments

Acute diseases develop quickly and are accompanied by unique symptoms that necessitate immediate or short-term treatment and improve once treated. Acute illnesses, such as the common cold, can sometimes go away on their own.

  • Chronic Diseases

Chronic diseases are illnesses that develop over time and endure for a long time or even a lifetime. Chronic disease is defined as a disease that lasts more than three years. The symptoms are relatively modest at first.