(a) What is the function of acid in stomach?
(b) What is the difference between autotrophic nutrition and heterotrophic nutrition?

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Solution

a) Hydrochloric acid is present in the gastric juices in the stomach. The pH of the gastric juice is between 1 to 2. HCl has important role in the digestion process. HCl in the stomach causes the activation of enzymes. HCl is used to convert the enzyme pepsinogen into pepsin. Pepsin breaks up the peptides from the protein. The acid destroys the bacteria and the other microorganisms entered in the body through food.
Autotrophic nutrition Heterotrophic nutrition
The food is prepared from light, chlorophyll, CO $_{2}$ and water. The food is obtained from other organisms.
Food can be produced in a day time. Food can be obtained all the time.
Chlorophyll pigment is required. Chlorophyll pigment is not required.
Green plants and bacteria have this type of nutrition. Animals and fungi have this type of nutrition.

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What are the differences between autotrophic nutrition and heterotrophic nutrition?

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What are the differences between autotrophic nutrition and heterotrophic nutrition?

what are the diffrences between autotrophic nutrition and heterotrophic nutrition?

Difference between autotrophic and heterotrophic nutrition

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Autotrophic nutrition	Heterotrophic nutrition
The food is prepared from light, chlorophyll, CO $_{2}$ and water.	The food is obtained from other organisms.
Food can be produced in a day time.	Food can be obtained all the time.
Chlorophyll pigment is required.	Chlorophyll pigment is not required.
Green plants and bacteria have this type of nutrition.	Animals and fungi have this type of nutrition.