Extra cellular digestion occurs in :
Correct answer: B. Grasshopper and frog
- A. Grasshoper and protozoa
- B. Grasshopper and frog
- C. Earthworm and protozoa
- D. Frog and protozoa
Explanation
Do you know what protozoans are? Yes, you do! They are single-cell organisms, just think if they are single-celled, why will they do extracellular digestion? They will digest inside the cell. So by reduction method A, C, and D options are wrong because they all contain protozoan, so no need to go deep(save time). Extracellular digestion refers to special molecules breaking down food for molecules outside the cell, contrasted by intracellular digestion which happens inside the cell. Intracellular digestion mainly occurs in unicellular organisms such as protozoans. In addition, extracellular digestion occurs in animals with a digestive system and fungi.
This question appeared on the ETEA MDCAT 2005 paper, which you can sit online with every answer explained.
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About Human Digestive System
The human digestive system breaks food into absorbable molecules through mechanical processing, enzyme action and chemical conditions along the alimentary canal. Questions cover the mouth, stomach, small and large intestines, liver, pancreas and associated secretions, including the digestion and absorption of carbohydrates, proteins, lipids, vitamins, minerals and water.
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