Question

please give me the answer of all question ​

Answer 1

1.Answer:

A nutrient is a substance used by an organism to survive, grow, and reproduce. The requirement for dietary nutrient intake applies to animals, plants, fungi, and protists. The six essential nutrients are vitamins, minerals, protein, fats, water, and carbohydrates.

2.Answer :

Symbiosis in lichens is the mutually helpful symbiotic relationship of green algae and/or blue-green algae (cyanobacteria) living among filaments of a fungus, forming lichen. [1][2][3] The algae or cyanobacteria benefit their fungal partner by producing organic carbon compounds through photosynthesis.

3.Answer;

The main reason behind this fact is that the human guts do not have the bacteria that help in the digestion of the cellulose while the cattles have such bacteria. Hence, the correct answer is 'B'. They do not have cellulose-digesting bacteria in their stomach.

4.Answer:

Villi are small finger-like projections found inside the inner walls of the small intestine. They v increase the surface area for absorption of the digested food. Each villus has a network of thin and small blood vessels close to its surface. The surface of the villi absorbs the digested food materials They are located in small intestine.

5.Answer:

When we vomit, an anti-peristaltic movement pushes food in the opposite direction to the peristaltic waves that normally move food down through the digestive tract. A reflex closes the glottis to prevent vomit from going into the trachea and the lungs.

6.Answer:

Iodine solution is used to test leaves for the presence of starch. You need to: heat a plant leaf in boiling water for 30 seconds (this stops its chemical reactions) heat it in boiling ethanol for a few minutes (this removes most of its colour)

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Eva

Answer 2

Answer:

I have answered all, just select any five

Explanation:

1) Nutrients are compounds in foods essential to life and health, providing us with energy, the building blocks for repair and growth and substances necessary to regulate chemical processes. There are six major nutrients: Carbohydrates (CHO), Lipids (fats), Proteins, Vitamins, Minerals, Water.

2)Symbiosis in lichens is the mutually helpful symbiotic relationship of green algae and/or blue-green algae (cyanobacteria) living among filaments of a fungus, forming lichen. The algae or cyanobacteria benefit their fungal partner by producing organic carbon compounds through photosynthesis.

3) Cellulose is sometimes found as dietary fibers and the fibers cannot be digested by humans but the consumption of fibers is important as it allows the food to move through the digestive tract and also help to eliminate the wastes. The main reason behind this fact is that the human guts do not have the bacteria that help in the digestion of the cellulose while the cattles have such bacteria.

4) Villi are small finger-like projections found inside the inner walls of the small intestine. They v increase the surface area for absorption of the digested food. Each villus has a network of thin and small blood vessels close to its surface. The surface of the villi absorbs the digested food materials.

5) When we vomit, an anti-peristaltic movement pushes food in the opposite direction to the peristaltic waves that normally move food down through the digestive tract. A reflex closes the glottis to prevent vomit from going into the trachea and the lungs.

6) The presence of starch in leaves can be tested by the Iodine test. When we remove chlorophyll from the leaf by boiling it in alcohol and then put two drops of iodine solution, it is colour change to blue indicates the presence of starch.