MEDIUM
7th CBSE
IMPORTANT
Earn 100

The given diagram shows the human heart. Complete the following table to indicate the characteristics of blood flow in regions P, Q, R and S.

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Characteristics of blood Region

High pressure deoxygenated blood

 

Low-pressure oxygenated blood

 
High-pressure oxygenated blood
 
 

Low pressure deoxygenated blood

 

Important Questions on Transportation in Plants and Animals

MEDIUM
7th CBSE
IMPORTANT
A person is met with an accident and he needs the blood of blood group A. A man wants to donate his blood to save his life but his blood group is O positive. How can he help him?
MEDIUM
7th CBSE
IMPORTANT
Due to short distance between lungs and heart, the walls of the right ventricle are
MEDIUM
7th CBSE
IMPORTANT

The adjacent diagrams show two cells found on the underside of a leaf. Joey did a study on the behaviour of stomata during the day and the night. She noticed that the size of stoma was larger during the day and smaller during the night.

1.  What is the function of the stoma in leaves?

2. Why do you think the stoma was smaller during the night?

3. Based on Joey's study, what caused the stoma to change its size?

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MEDIUM
7th CBSE
IMPORTANT

The following diagram shows the circulatory system of a human being.
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The blood vessels above are labelled with letters. State which blood vessel(s) are rich in carbon dioxide.

MEDIUM
7th CBSE
IMPORTANT
The two blood vessels are designated for transfer of blood. What is the difference in the function performed by the two?