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what is brianly appp​

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Q 13.What is the role of Hydrochloric acid in stomach?

Ans.It converts the inactive enzyme into the active enzyme pepsin, which is responsible for digesting proteins in your stomach.

Q 14.Why does the heart have different chambers?

Ans.Because every chamber has a specific role. The smaller ones, placed in the superior part, are the atria, they collect the blood from the body (venous blood from the organs, with CO2, and from the lungs (with O2), while the ventricles pump the blood they get from the atria to the body (to the lungs and to the organs).

Q 15.Write chemical equation for photosynthesis?

Ans. 6CO2 + 6H2O —> C6H12O6 + 6O2.

Q 16.What is fermentation?

Ans.The chemical breakdown of a substance by bacteria, yeasts, or other microorganisms, typically involving effervescence and the giving off of heat.

Q 17.What is reflex arc?

Ans.The nerve pathway involved in a reflex action, including at its simplest a sensory nerve and a motor nerve with a synapse between.

Q 18.State the function of nervous tissue?

Ans.Functions of the nervous system are sensory input, integration, control of muscles and glands, homeostasis, and mental activity.Nerves carry the signals to the brain.

Q 19.What is self pollination?

Ans.The pollination of a flower by pollen from the same flower or from another flower on the same plant.

Q 20.What is fertilization?

Ans.The action or process of fertilizing an egg or a female animal or plant, involving the fusion of male and female gametes to form a zygote.

Q 23.what is the function of Ciliary muscles?

Ans.Function of the ciliary muscles is to help regulate the flow of aqueous humor in the eye.

Q 24.Why is biogas an excellent fuel?

Ans. Biogas can be produced from raw materials such as agricultural waste, manure, municipal waste, plant material, sewage, green waste or food waste. Biogas is a renewable energy source. ... This energy release allows biogas to be used as a fuel; it can be used for any heating purpose, such as cooking.

Q 25.What are producers?

Ans.A person, company, or country that makes, grows, or supplies goods or commodities for sale.

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