Question

1) How do you prove that Sunlight and Carbon Dioxide(CO2) are essential factors for the process of Photosynthesis?

2) Describe the process of Digestion in Complex Organisms?

3) Write the deficiency diseases of the Water Soluble Vitamins?

4) Draw neat labelled diagram of Digestive System?​

Answer 1

Answer:

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Answer:-1

To prove :- the necessity of carbon dioxide and sunlight in photosynthesis following steps need to do

procedure:-

• Insert a part of the leaf of a destarched plant into a conical flask containing potassium hydroxide.
• Potassium hydroxide solution absorbs the carbon dioxide gas from the air present in the glass bottle.
• Leave the plant sunlight.
• After few hours, perform a starch test to this and another leaf of the same plant.

Observation-

Leaf exposed to the atmosphere are bluish black.Leaf exposed to KOH does not change to blue-black colour.

Result- Starch is present in the green part of the leaf.

Conclusion- Presence of starch proves that chlorophyll is necessary for photosynthesis as it traps sunlight.

Answer:2

Step 1: Mouth

To more easily absorb different foods, your saliva helps break down what you’re eating and turn it into chemicals called enzymes.

Step 2: Esophagus

Once your food is broken down from saliva and chewing, it moves through your esophagus, which is the pipe that connects your mouth to your stomach.

Step 3: Stomach

Your stomach is where food is stored and further broken down by acid and powerful enzymes. From there, food moves into the small intestine.

Step 4: Small Intestine

Most nutrients are absorbed in the small intestine, where food is broken down.

Step 5: Large Intestine, Colon, Rectum and Anus:-

The colon is a long muscular tube that connects the small intestine to the rectum. It’s responsible for processing waste.

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Answer 2

To prove :- the necessity of carbon dioxide and sunlight in photosynthesis following steps need to do

procedure:-

Insert a part of the leaf of a destarched plant into a conical flask containing potassium hydroxide.

Potassium hydroxide solution absorbs the carbon dioxide gas from the air present in the glass bottle.

Leave the plant sunlight.

After few hours, perform a starch test to this and another leaf of the same plant.

Observation-

Leaf exposed to the atmosphere are bluish black.Leaf exposed to KOH does not change to blue-black colour.

Result- Starch is present in the green part of the leaf.

Conclusion- Presence of starch proves that chlorophyll is necessary for photosynthesis as it traps sunlight.

Hope this helps you