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Class 7 science extra questions ans Nutrition in plants

Chapter 1: Nutrition in plants

Extra Questions

Objective Questions

A. Fill in the blanks:

1. Leaves are called the ________ of plants.

2. Cuscuta is an example of ___________.

3. ___________ are chlorophyll containing partner.

4. Most of the pulses are _____________ plants.

5. In ___________ mode of nutrition, the living being consumes other plants or animals.

Answers:

1. food factory

2. parasitic plant

3. Lichens

4. Leguminous

5. heterotrophic

B. State true or false:

1. The synthesis of food in plants occurs in roots.

2. Stomata help leaves to capture the energy of sunlight.

3. Mushroom is an edible fungus.

4. Chlorophyll is a yellow colour pigment.

5. Farmers use fertilizers to replenish the soil.

Answers:

1. False 2. False 3. True 4. False 5. True

Subjective Questions

A. Very Short Answer Type Questions

1. What are the two modes of nutrition?

Answers: Two modes of nutrition are:

1. Autotrophic Nutrition

2. Heterotrophic Nutrition

2. What is Rhizobium and where are they found in plants?

Answer: Rhizobium is a bacterium present in the roots of some plants.

3. How are heterotrophs classified, name them?

Answers: Heterotrophs are classified as:

1. Herbivore

2. Carnivore

3. Omnivore

4. Write the name of some components of food.

Answer: Proteins, carbohydrates, vitamins, minerals etc. are some components of food.

5. Name a plant which cannot produce its own food due to absence of chlorophyll in it.

Answer: Venus flytrap.

6. Name the organism that grows in moist rotten bread.

Answer: Fungus.

7. Name the raw materials that are used during photosynthesis.

Answer: Sunlight, carbon dioxide, water and chlorophyll.

8. What are the end products of photosynthesis?

Answer: Carbohydrate, water and oxygen are the end products of photosynthesis.

9. Define nutrition.

Answer: The way a living being consumes food and its use by the body is referred to as nutrition.

10. Give an example of autotrophs and heterotrophs. Answer: All green plants are autotrophs while all animals are heterotrophs.

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