Question

Give reasons for the following

1 villi are present in the small intestine.

2Fertilizers and manure are added to the soil by farmers​

Answer 1

Answer:

1) villi is a surface area for the absorption of food

2) Organic matter can be used for manure

Explanation:

Answer 2

Answer :-

1) villi are present in the small intestine.

Reason

Absorption of nutrients take place in the small intestine in the small intestine. Because villi finger like projection present in the lining of the small intestine.

Villi are present in the small intestine to increase the surface area making absorption more efficient.

• Network of blood vessel.

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2) Fertilizers and manure are added to the soil by farmers.

Reason

The upper layer of soil is rich in various nutrient. Plant needs nutrient for their growth they get these nutrient from the soil.Soil fertilities are measure of a land capacities to sufficiently provide the nutrient that are needed to grow crop. Fertilizer and manures added to the soil by farmer to give nutrients and mineral to the plants .

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Additional Information

• Small Intestine is highly coiled about 7.5 m.It cover most part of abdominal cavity.
• Entry of different substance from external environment and body cavity through biological membrane is called absorption.