CBSE Class 7 Science Life Processes in Plants (Class 7 NCERT New) Quiz 4

1. Part E: Case-Based Questions. Case Study 1. Priya kept one plant near a sunny window and another in a completely dark room for a week. The plant in sunlight stayed green and healthy, while the one in darkness turned yellowish and weak with very little growth. Choose the correct option. Which factor necessary for photosynthesis was absent in the dark room?

A Sunlight B Water C Carbon dioxide D Chlorophyll

2. Part E: Case-Based Questions. Case Study 1. Priya kept one plant near a sunny window and another in a completely dark room for a week. The plant in sunlight stayed green and healthy, while the one in darkness turned yellowish and weak with very little growth. Choose the correct option. Name the green pigment involved in food preparation in plants.

A Carotene B Xanthophyll C Chlorophyll D Melanin

3. Part E: Case-Based Questions. Case Study 2. A gardener watered plants regularly but noticed droplets of water on leaf edges early in the morning. Choose the correct option. Which process is related to water loss from leaves?

A Transpiration B Respiration C Germination D Photosynthesis

4. Part E: Case-Based Questions. Case Study 2. A gardener watered plants regularly but noticed droplets of water on leaf edges early in the morning. Choose the correct option. Through which structures does this water loss occur mainly?

A Stomata B Veins C Cuticle D Nodes

5. Part E: Case-Based Questions. Case Study 2. A gardener watered plants regularly but noticed droplets of water on leaf edges early in the morning. Choose the correct option. Which statement best explains a useful effect of transpiration for plants?

A It helps pull water upward and cools the leaves B It directly increases sugar production without photosynthesis C It decreases mineral uptake by roots D It causes permanent wilting of plants

6. What is the main purpose of photosynthesis in plants?

A To produce oxygen B To create food in the form of glucose C To absorb water from the soil D To release carbon dioxide

7. In which part of the plant does photosynthesis primarily occur?

A Roots B Stems C Leaves D Flowers

8. What are the main products of cellular respiration?

A Glucose and oxygen B Carbon dioxide and water C ATP and glucose D Carbon dioxide and ATP

9. During photosynthesis, what gas is taken in by plants?

A Oxygen B Nitrogen C Carbon dioxide D Hydrogen

10. What is transpiration in plants?

A Absorption of water from the soil B Release of oxygen into the air C Process of taking in carbon dioxide D Loss of water vapor from the leaves