Gaseous Exchange in Plants

Q.

What is pollination? Explain its types.

Q.

Why is vegetative reproduction considered a type of asexual reproduction?

Q.

What are the advantage and disadvantages of vegetative reproduction?

Q.

What are stomata? Give two functions of stomata.

Q.

What gas is released during photosynthesis?

Q.

What is the role of root hair?

Q.

Mangrove trees grow in areas, where water floods the land they grow on, from time to time. To adapt, they have special roots (that look like spikes sticking out from the ground) to help them breathe. Choose the option that explains why.

1. Roots breathe using stomata. When the land floods, the spikes which are above the water can breathe easily.

2. Roots breathe by diffusion. When the land floods, the spikes absorb water to enable breathing.

3. Roots breathe though diffusion. When the land floods, the spikes which are above the water can breathe easily.

4. Roots breathe using stomata. When the land floods, the spikes absorb water to enable breathing.

Q. How is energy produced in cells?

Q.

What helps them to breathe? (a) A fish (b) A snake (c) A crane (d) An earthworm (e) a Man (f) A banyan (g) Caterpillar

Q.

Which structure in the leaves of plants is responsible for exchange of oxygen and carbon dioxide?

1. Stomata

2. Pores

3. Chlorophyll

4. Leaves

Q.

The plants gives out carbon dioxide at the night time if it is true , than from where we get oxygen at the night time?

Q. Sam likes watering plants and he kept overwatering plants untill the pot was filled with water. Is it a correct practice?

1. Yes, because plants require a lot of water.
2. No, because plants require very little water.
3. Yes, because roots take up air from water.
4. No, because roots will not get air.

Q. Plants absorb _____ gas during photosynthesis.

1. oxygen
2. nitrogen
3. argon
4. carbon dioxide

Q. Why do cockroaches die when put in water?

Q.

What is the seed buds in potato called?

Q.

Plants take in ______ and release ______ in the atmosphere during respiration.

1. oxygen, nitrogen

2. carbon dioxide, nitrogen

3. oxygen, carbon dioxide

4. oxygen, argon

Q.

Earthworm respires through

1. gills

2. lungs

3. moist skin

4. spiracles

Q. Who has the slowest rate of breathing in the world in animals excluding humans?

Q.

Which of the following is not a characteristic of a leaf?

1. Transpiration

2. Photosynthesis

3. Absorption of water and minerals from the soil

4. Has a green pigment

Q.

Which of the following are functions of stomata?

1. Transpiration

2. Respiration

3. Exchange of gases

4. Exchange of nutrients

Q.

The tiny pores in leaves for the exchange of gases are called ___ .

1. Stomata

2. Lenticels

3. Chlorophyll

4. Plastids

Q.

Which of the following is not a part of the innermost whorl of flower?

1. Ovary

2. Petal

3. Style

4. Stigma

Q.

Plants Respire Through ______.

Q.

Minute openings present on under surface of leaves are known as ________.

Q.

Explain how the direction of exchange of gases in plants changes during a day.

Q.

Question 11
Choose the correct option from the following:
Which part of the plant takes in carbon dioxide from the air for photosynthesis?
(i) Root hair (ii) Stomata (iii) Leaf veins (iv) Sepals

Q.

Question 4
Take three test-tubes. Fill each of them with water. Label them A, B and C. Keep a snail in test-tube A, a water plant in test-tube B and in C, keep snail and plant both. Which test tube would have the highest concentration of $C{O}_2$?

Q.

What are stomata? give two function of stomata.

Q.

Question 7 (ii)
Mark ‘T’ if the statement is true and ‘F’ if it is false:
(ii) Plants carry out photosynthesis only during the day and respiration only at night.

Q.

Which gas is utilised by plants during photosynthesis?

1. Hydrogen

2. Carbon Dioxide

3. Helium

4. Oxygen