Breathing in Plants

Q. Roots, stems and leaves of plants exchange gases for respiration separately.

1. True
2. False

Q.

Air is a mixture of gases.

1. True

2. False

Q.

Question 7

The component of air used by green plants to make their food, is ___.

Q. The composition of air is not constant and changes from place to place.

1. True
2. False

Q. During respiration plants absorb________.

1. Carbon dioxide
2. Nitrogen
3. Oxygen
4. Hydrogen

Q. During rainy season, animals living in the soil come out of their holes for

1. reproduction
2. excretion
3. respiration

Q.

Fill in the blanks to complete the analogy:

Oxygen: 21%; Nitrogen: _____

Q.

Give one word for the following -
the gas which makes up about one-fifth of air

Q. Describe the term air. Name the constituents of air and represent them on a pie chart based on their composition. [5 MARKS]

Q.

Match the components in column I with the percentage by volume in column II as per the composition of air.

1. (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)

2. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)

3. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

4. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)

Q.

Kenneth wanted to interact more with John and Sam and hence decided to ask more about the composition of air. He asked John and Sam ' what is the exact composition of air?' Sam being the man with information took the liberty to explain him that the composition of air is not fixed everywhere and it varies from place to place but we can have a rough estimate of its composition. Sam further went ahead to make the following table.

Sam further went on to match the components in column I with the percentage by volume in column II as per the composition of air. Which of the following options are correct for the above table

1. (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)

2. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

3. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)

4. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)

Q.

Question 9

How do plants and animals help each other in the exchange of gases in the atmosphere?

Q.

Name a plant in which stomata are absent.

Q.

State if the following statements are true or false. Rewrite the false statements correctly.

Plants give out carbon dioxide during respiration.

1. True
2. False

Q. Find out the wrong statement.

1. Respiration release energy.
2. Respiration occurs in all animal and plant cell.
3. Respiration takes place continuously both in light and in the dark.
4. Respiration synthesizes food.

Q. Gas that constitutes nearly 21% of air by volume is .

1. carbon dioxide
2. nitrogen
3. oxygen

Q. Plants take in oxygen and give out carbon dioxide during respiration.

1. False
2. True

Q. Which gas constitutes nearly 21% of air by volume?

1. Oxygen
2. Nitrogen
3. Hydrogen
4. Argon

Q. Plants take in oxygen and give out carbon dioxide during respiration.

1. True
2. False

Q. Leaves comprise of tiny pores referred as:

1. Stomata
2. Pores
3. Chlorophyll
4. Holes

Q. Do plant need oxygen? If so, what is its source?

Q. Gas that constitutes nearly 21% of air by volume is .

1. carbon dioxide
2. nitrogen
3. oxygen

Q.

Question 9.1

State whether the following statements are true or false. If false, correct them.

Plants consume oxygen for respiration.