Question

Hydra can digest all types of food except
A. Proteins
B. Fats
C. Starch
D. None of the above

Answer 1

Hint: Hydra are invertebrates with two layers of cells in their bodies. They are freshwater creatures. They have a radially symmetric body. They eat and excrete waste through a central cavity. Hydra is a genus of freshwater invertebrates belonging to the Hydrozoa class (phylum Cnidaria). The body of such an organism is made up of a thin, flexible membrane.

Complete answer:
The Hydra was a multi-headed monster in Greek mythology that sprouted two additional heads for every one it lost. The real-life animal named after this fabled beast, it turns out, is even more tenacious. According to a new study, Hydra - spindly freshwater polyps — can live indefinitely without showing signs of age.

Hydra can digest proteins, lipids, and some carbs, but not starch, because salivary and pancreatic amylase are absent. Food of Hydra is water fleas (Daphnia and Cyclops). Thus, it is carnivorous. It cannot digest starch.

As a result, the right response is C 'Starch'.

Starch is a polysaccharide that is made up of a chain of glucose molecules that have been linked together to form a larger molecule. In starch, there are two forms of polysaccharide: Amylose is a glucose chain that runs in a straight line. Amylopectin is a glucose chain that is extremely branched.

Carbohydrates include starch. It has a considerable number of carbon, hydrogen, and oxygen atoms in its molecules. At room temperature, starch is a white substance that does not dissolve in cold water. Rice, potatoes, and wheat, for example, store their energy as starch.

Note:-
When you initially start chewing, protein digestion begins. Amylase and lipase are two enzymes found in your saliva. Carbohydrates and lipids are the main things they break down. When a protein source reaches your stomach, it is broken down into smaller chains of amino acids by hydrochloric acid and proteases.