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Consider the following statements about photosynthesis:
1. Desert plants take up carbon dioxide at night and complete the process using light during the day.
2. Both sunlight and chlorophyll are needed for the process.
3. Oxygen is taken in and carbon dioxide is released during the process.
Which of the statements given above is/are correct?
The following events take place in a leaf during photosynthesis:
1. Carbon dioxide is reduced to carbohydrate
2. Light energy is absorbed by chlorophyll
3. Carbohydrate is stored as starch
4. Water molecules are split into hydrogen and oxygen
Select the correct order of these events.
Consider the following statements about stomata and transpiration:
1. Most of the exchange of gases in leaves takes place through stomata.
2. Each stoma is opened and closed by two guard cells.
3. Transpiration pull is the main force lifting water at night, while root pressure matters more by day.
Which of the statements given above is/are NOT correct?
Match List-I with List-II:
| List-I (Plant tissue) | List-II (Feature) |
|---|---|
| A. Apical meristem | 1. Increases girth |
| B. Lateral meristem | 2. Stores food |
| C. Intercalary meristem | 3. Increases length at tips of stem and root |
| D. Parenchyma | 4. Found at base of leaves or internodes |
Select the correct answer using the codes given below.
Match List-I with List-II:
| List-I (Plant hormone) | List-II (Role) |
|---|---|
| A. Auxin | 1. Inhibits growth; wilting of leaves |
| B. Gibberellins | 2. Promotes cell division; found more in fruits and seeds |
| C. Cytokinins | 3. Made at shoot tip; helps cells grow longer |
| D. Abscisic acid | 4. Helps in growth of stem |
Select the correct answer using the codes given below.
Consider the following statements about plant movements:
1. In the touch-me-not plant, leaves fold because cells lose water and change shape, without any growth.
2. Tendrils of the pea plant sense touch and coil around a support.
3. In phototropism, more auxin collects on the side of the shoot facing the light.
Which of the statements given above is/are correct?
Consider the following statements about transport in plants:
1. Xylem carries food made in the leaves to other parts of the plant.
2. Movement of the products of photosynthesis through phloem is called translocation.
Which of the statements given above is/are correct?
Match List-I with List-II:
| List-I (Tropism) | List-II (Stimulus) |
|---|---|
| A. Phototropism | 1. Water |
| B. Geotropism | 2. Chemicals |
| C. Hydrotropism | 3. Light |
| D. Chemotropism | 4. Gravity |
Select the correct answer using the codes given below.
Consider the following statements about stomata:
1. Most of the exchange of gases in a plant takes place through stomata.
2. Each stoma is opened and closed by a pair of guard cells.
3. Stomata are tiny pores found mainly on the surface of roots.
Which of the statements given above is/are correct?
Consider the following statements about plant hormones:
1. Auxin is synthesised at the tip of the shoot.
2. Cytokinins are present in larger amounts in fruits and seeds.
3. Wilting of leaves is an effect of gibberellins.
Which of the statements given above is/are NOT correct?
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