CBSE Class 7 Science Life Processes in Plants (Class 7 NCERT New) Quiz 6

1. What gas is released by plants as a product of photosynthesis?

A Carbon dioxide B Nitrogen C Hydrogen D Oxygen

2. Which part of a flower contains the pollen grains needed for generative reproduction?

A Pistil B Petal C Anther D Sepal

3. The chemical equation for photosynthesis can be written as: . What does represent?

A Carbon dioxide B Water C Glucose (sugar) D Oxygen

4. What is the main function of xylem tissue in a plant?

A To transport sugar from leaves to other parts of the plant B To transport water and minerals from roots to leaves C To produce new cells for plant growth D To store food in the stem

5. A plant is placed in a dark room for several days. Which of the following outcomes would most likely occur?

A The plant produces more oxygen than usual B The plant grows faster because it saves energy C The plant cannot perform photosynthesis and begins to lose energy D The plant switches to absorbing nitrogen instead of carbon dioxide

6. How does vegetative reproduction differ from generative reproduction in plants?

A Vegetative reproduction requires pollen, while generative reproduction does not B Vegetative reproduction produces new plants from non-reproductive parts, while generative reproduction involves seeds formed from fertilization C Vegetative reproduction only occurs in trees, while generative reproduction occurs in all plants D Vegetative reproduction is slower than generative reproduction

7. Why do leaves have tiny pores called stomata on their surface?

A To absorb sunlight more efficiently B To allow the exchange of gases such as carbon dioxide and oxygen C To store water inside the leaf D To attract insects for pollination

8. A student notices that a plant with yellow leaves grows much slower than a plant with green leaves. Using your knowledge of photosynthesis, explain why this happens.

A Yellow leaves contain more chlorophyll, making photosynthesis faster B Yellow leaves have less chlorophyll, reducing the plant's ability to capture light and produce food C Yellow leaves absorb more water, causing the plant to grow slower D Yellow leaves release more carbon dioxide, which slows down growth

9. Which of the following best explains why phloem is important for a plant's survival?

A It provides structural support to keep the plant upright B It distributes glucose produced during photosynthesis to all parts of the plant that need energy C It absorbs sunlight and converts it into chemical energy D It transports water from the soil to the leaves

10. A farmer wants to grow more plants quickly without waiting for seeds. Which method of reproduction should the farmer use, and why?

A Generative reproduction, because seeds always produce healthier plants B Vegetative reproduction, because it produces new plants faster using cuttings or runners C Generative reproduction, because it does not require any parent plant D Vegetative reproduction, because it creates plants with completely new genetic traits