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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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