Gaseous Exchange In Plants

1. What is gaseous exchange in plants?

• The process of converting carbon dioxide into oxygen.

• The process of taking in carbon dioxide and releasing oxygen.

• The process of taking in oxygen and releasing carbon dioxide.

• The process of converting oxygen into carbon dioxide.

2. What are the tiny openings on the underside of a leaf called?

• Guard cells

• Chloroplasts

• Stomata

• Mesophyll cells

3. How does carbon dioxide enter the leaf?

• Through the roots

• Through the stem

• Through the stomata

• Through the flowers

4. What is the main gas that plants need for photosynthesis?

• Oxygen

• Nitrogen

• Carbon dioxide

• Hydrogen

5. How does carbon dioxide move from the air outside the leaf to the inside?

• Through active transport

• Through osmosis

• Through diffusion

• Through transpiration

6. What is diffusion?

• The process of plants sweating

• The process of water moving through plants

• The process of gases moving from an area of high concentration to an area of low concentration

• The process of releasing oxygen during photosynthesis

7. What happens to oxygen during gaseous exchange in plants?

• It diffuses into the leaf and is used for photosynthesis.

• It diffuses out of the leaf through the stomata.

• It converts into carbon dioxide.

• It is released through the roots.

8. What structures in the leaf help distribute carbon dioxide throughout the plant?

• Stomata

• Guard cells

• Intercellular spaces

• Xylem vessels

9. What is the primary site of gaseous exchange in leaves?

• Palisade mesophyll

• Spongy mesophyll

• Epidermis

• Stomata

10. Why is gaseous exchange important for plants?

• It helps them take in nutrients from the soil.

• It allows them to release excess water.

• It enables them to produce energy through respiration.

• It provides them with the carbon dioxide needed for photosynthesis.