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Class 7 Science Chapter 1 Question Answers - Nutrition in Plants

Very Short Q & A :

Ques 1: Name some components of food.

Ans: Carbohydrates, proteins, fats, vitamins and minerals.

Ques 2: Define nutrients.

Ans:  Carbohydrates, proteins, fats, vitamins and minerals are essential components of food, these components are called nutrients.

Ques 3: Give an example of autotrophs.

Ans: All green plants.

Green plantsGreen plants

Ques 4: Give an example of heterotrophs.

Ans: Animals and human beings.

Ques 5: Plants prepare their food by using raw materials present in their  __________________.

Ans: Surrounding

Ques 6: What do you mean by nutrition?

Ans: Nutrition is the mode of taking food by an organism and its utilisation by body.

Ques 7: Name the food factories of plants.

Ans: Leaves


 Green leaves Green leaves

Ques 8: Name the tiny pores present on the surface of leaves.

Ans: Stomata

Class 7 Science Chapter 1 Question Answers - Nutrition in Plants

Ques 9: Name the green pigment present in leaves.

Ans: Chlorophyll

Ques 10: ____________ helps leaves to capture the energy of sunlight

Ans: Chlorophyll

Ques 11: Why photosynthesis is named so?

Ans: Because the synthesis of food occurs in presence of sunlight.

Class 7 Science Chapter 1 Question Answers - Nutrition in Plants

Ques 12: Sun is the ultimate source of energy for all living organisms. True / False

Ans: True

Ques 13: Where does the nucleus of cell lies?

Ans: In the centre of cell.

 Cell Cell

Ques 14: State the equation for the process of photosynthesis.

Ans: Carbon dioxide + water —————> carbohydrate + Oxygen(in the presence of sunlight)

Ques 15: The nucleus in a cell is surrounded by a jelly like substance called ___________.

Ans: Cytoplasm

Ques 16: Why algae present in stagnant water bodies are green in colour?

Ans: Because they contain green colour pigment chlorophyll.

 Chlorophyll cells Chlorophyll cellsQues 17: Name a component of food other than carbohydrate synthesize by plants.

Ans: Proteins and Fats

Ques 18: Name some insectivorous plants.

Ans: Pitcher plants and Venus flytraps are insectivorous plants.

Ques 19: In saprotrophic mode of nutrition organisms take in nutrients from

a. Oxygen mask

b. Water mask

c. Pollution mask

d. None of these

Ans:  Both a and b.

Venus FlytrapVenus Flytrap

Ques 20: During photosynthesis plants take in _______________ and releases _______________.

Ans: Carbon dioxide and oxygen

Ques 21: Some organisms live together and share shelter and nutrients, this type of relationship is called

Ans: Symbiotic relationship.

Ques 22: Lichen is a symbiotic association between __________ and Fungi.

Ans: Algae and Fungi.

Fig: LichensFig: Lichens

Ques 23: Name the edible fungi.

Ans: Mushroom.

Ques 24: Name the organism responsible for converting atmospheric nitrogen into soluble forms.

Ans: Rhizobium bacteria.

Fig: RhizobiumFig: RhizobiumQues 25: Where we can see Rhizobium bacteria?

a. Dead matter

b. Decaying matter

c. Both a and b

d. None of these

Ans: In root nodules of gram, peas, moong, beans and other leguminous plants.

Ques 26: Give an example of parasites.

Ans: Cuscuta plants.

Cuscuta PlantCuscuta Plant

Ques 27: Give an example of saprotrophs.

Ans: Fungi

Ques 28: Amarbel is an example of

a. Parasite

b. Host

c. Autotrophs

d. Saprotrophs

Ans: Parasite

Ques 29: Carbon dioxide is released during photosynthesis. True/ False.

Ans: False

Ques 30: During photosynthesis solar energy is converted into chemical energy. True/ False.

Ans: True

Ques 31: The product of photosynthesis is

a. Carbohydrate

b. Protein

c. Fats

d. All of these

Ans: All of these

Ques 32: Name a plant that has both autotrophic and heterotrophic mode of nutrition.

Ans: Insectivorous plants

Ques 33: Name a parasitic plant with yellow, slender and tubular type of stem.

Ans: Amarbel

Ques 34: Name the pores present in leaves through which exchange of gas takes place.

Ans: Stomata

Ques 35: Animals are autotrophs. True/ False.

Ans: False

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FAQs on Class 7 Science Chapter 1 Question Answers - Nutrition in Plants

1. What is the process of nutrition in plants?
Ans. Nutrition in plants involves the absorption of water and minerals through the roots, photosynthesis in the leaves to produce food, and transportation of nutrients throughout the plant via the vascular system.
2. How do plants obtain nutrients from the soil?
Ans. Plants absorb nutrients from the soil through their root system. The roots take up water and minerals from the soil, which are then transported to other parts of the plant for growth and metabolism.
3. What is the role of chlorophyll in plant nutrition?
Ans. Chlorophyll is a pigment in plant cells that absorbs sunlight to facilitate photosynthesis. It helps convert light energy into chemical energy, which is used by plants to produce glucose and oxygen.
4. How do plants use the nutrients obtained through photosynthesis?
Ans. The nutrients produced through photosynthesis, such as glucose, are used by plants as a source of energy for growth, reproduction, and overall metabolism. Some glucose is stored as starch for later use.
5. Why is photosynthesis important for plant nutrition?
Ans. Photosynthesis is crucial for plant nutrition as it is the process by which plants produce their own food. It allows plants to convert sunlight into energy, which is essential for their survival and growth.
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