Question

1.How would you test the presence of starch in leaves?

2.Write the equation to represent the process of photosynthesis.

3.What are stomata? Write their functions.

4. Mention two point difference between autotrophs and heterotrophs?

5.Name the glands that secretes the digestive juices in our body?

6. Where is the bile produced? which component of the food does it help to digest?

7. what is ORS? Why it is used for?

8. How does an amoeba capture its food?

9. Why human beings cant digest grass?

10 What are called ruminants? Give two examples?


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Answer 1

Answer:

1. 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
2. simple word equation that can be used to describe the process of photosynthesis is carbon dioxide + water —> glucose + oxygen + water. A balanced chemical equation for the process can be written as 6CO2 + 6H2O —> C6H12O6 + 6O2. Overall, photosynthesis uses light energy to convert carbon dioxide into a carbohydrate.
3. Stomata are tiny openings or pores in plant tissue that allow for gas exchange. ... Specialized cells known as guard cells surround stomata and function to open and close stomatal pores. Stomata allow a plant to take in carbon dioxide, which is needed for photosynthesis.
4. Autotrophs are organisms that can produce their own food from the substances available in their surroundings using light (photosynthesis) or chemical energy (chemosynthesis). Heterotrophs cannot synthesize their own food and rely on other organisms — both plants and animals — for nutrition.
5. Salivary glands. Gastric glands in the stomach. Secretory cells(islets) in the pancreas. Secretory glands in the small intestine.
6. liver
7. Oral rehydration solutions (ORS) are used to treat dehydration caused by diarrhea, a common illness in travellers. Unlike other fluids, the ratio of the ingredients in an ORS matches what the body needs to recover from a diarrheal illness.

9.The first is that human stomachs have difficulty digesting raw leaves and grasses. Animals such as cows, on the other hand, have a specialized stomach with four chambers to aid in the digestion of grass (a process called rumination)

10)Ruminants include cattle, sheep, goats, deer, giraffes, antelopes, and camels.