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eval_testing_mns

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the organism increases different parts becomes specialized to perform different functions.
The large complex food molecules such as carbohydrates, proteins , lipids, etc., are broken down
in to simple molecules before they are absorbed and utilized by the animals. This process of
breaking down of complex molecules into simple molecule is called digestion.
In human beings the food eaten is broken down in various steps with the help of enzymes secreted
by digestive glands which are associated with the alimentary canal and the digested food is absorbed
in small intestine to be sent to all cells in the body.
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20 X Class Nutrition - Food supplying system
The digestive system includes the alimentary tract and several associated organs and digestive
glands. The functions of system are as follows :
a) Ingestion: Taking of food into the body
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A
b) Digestion: Breaking up of complex food substances into the simple substances by specific
enzymes. So that they can be used by the body.
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c) Absorption: The passage of digested food through the walls of alimentary tract (particularly
in small intestine ) into circulatory system.
d) Defecation: The passage of undigested material from the body by the way of anus.
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NG
1. Write differences between (AS1)
a) autotrophic nutrition - heterotrophic nutrition b) Ingestion - digestion
c) Light reaction - dark reaction d) Chlorophyll - chloroplast
2. Give reasons (AS1)
a) Why photosynthesis is considered as the basic energy source for most of living world?
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b) Why is it right to call the dark phase of photosynthesis as a light independent phase?
c) Why is it necessary to destarch a plant before performing any experiment on photosynthesis?
d) Why is not possible to demonstrate respiration in green plant kept in sun light?
3. Give examples (AS1)
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a) Digestive enzymes b) Organisms exhibiting heterotrophic nutrition
c) Vitamins d) Nutritional deficiency diseases
4. From where do plants get the raw materials required for photosynthesis?(AS1)
5. Explain the process of photosynthesis in with the help of a flow chart? (AS1)
6. Name the three end products of photosynthesis? (AS1)
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7. What is the substance that connects light reaction and dark reaction? (AS1)
8. In most of leaves the upper surface will be more green and shiny than the lower surface. Why?
(AS1)
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9. Explain the structure of chloroplast with a neatly labeled sketch. (AS5)
10. What is the role of acid in stomach? (AS1)
11. Mention the names of glands and organs which help in digestion? (AS1)
12. How is the small intestine designed to assimilate the food? explain. (AS1)
13. How are fats digested? Where do they get digested? (AS1)
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14. What is the role of saliva in the digestion of food? (AS1)
15. What will happen to protein digestion as the medium of intestine is gradually rendered alkaline?
(AS1)
16. What is the role of roughages in the alimentary tract? (AS1)
17. What is malnutrition? Explain few nutritional deficiency diseases. (AS1)
18. How do fungi and bacteria obtain their nourishment? (AS2)
19. If we keep on increasing CO2 concentration in air what will be the rate of photosynthesis?(AS2)
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20. What happens if the rate of respiration is more than the rate of photosynthesis in a plant?(AS2)
21. How can you say that the carbohydrates are not digested in the stomach?(AS1)
22. What process do you follow in the laboratory to study the presence of starch in leaves?(AS3)
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A
23. How would you demonstrate that green plant releases oxygen when exposed to light?(AS3)
24. Visit a primary health centre and collect the information about the children at diffrent ages suffering
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AN