NCERT Solutions for Class 7 Science Chapter 1: Nutrition of Plants

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NCERT Solutions for Class 7 Science Chapter 1 Nutrition of Plants are provided in the article below. The important topics that are included in this chapter are:

Mode of Nutrition in Plants
Photosynthesis
Saprotrophs
How Nutrients are replenished in the soil

Download PDF: NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants

NCERT Solutions for Class 7 Science Chapter 1

NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants are given below:

Also check: Concept Notes on Nutrition in Plants

Class 7 Science Chapter 1 Nutrition of Plants: Important Topics

Plant nutrition is the study of the chemical elements and compounds necessary for plant growth, plant metabolism, and their external supply. In its absence the plant is unable to complete a normal life cycle, or that the element is part of some essential plant constituent or metabolite.

Mode of Nutrition in Plants

Nutrition is the process of obtaining food, utilizing it to grow, stay healthy and repair any damaged body part. Plants produce their food by making use of raw materials from their surroundings, such as minerals, carbon dioxide, water, and sunlight. There are two modes of nutrition:

Autotrophic – Plants show autotrophic nutrition, which is called primary producers. Plants make their food by using light, carbon dioxide, and water.
Heterotrophic – Both animals and human beings depend on plants for their food and are therefore called heterotrophs.

Photosynthesis

Plants are able to synthesize their own food through a process known as photosynthesis. The chloroplast is the site of photosynthesis. Initially, the food production is carried out in leaves. Water and minerals from the soil are absorbed by the root which is then transported to the leaves through vessels. Carbon dioxide reaches leaves through stomata, which are small pores on leaves surrounded by guard cells.

Saprotrophs

Saprotroph, also called saprophyte or saprobe, is an organism that feeds on the nonliving organic matter known as detritus at a microscopic level. The saprophytic plants derive nutrition from dead and decaying plants and animals, and they dissolve the dead and decaying matter by secreting digestive juices and absorbing the nutrients.

How Nutrients are replenished in the soil

Nutrients can be replenished in the following ways: Fertilisers and manures contain plant nutrients such as nitrogen, phosphorous and potassium, etc. So, the soil gets enriched with nutrients like nitrogen, phosphorous and potassium, etc when fertilizers and manures are added to the soil in the fields.

Also check: CBSE Class 7 Science NCERT Textbook

Related Links:

Plant Physiology	Difference Between Deforestation and Afforestation	Difference Between Thorns and Spines
Transportation in Plants	Herbs and their benefits	Synthetic fibers
Autotrophic Nutrition	Heterotrophic Nutrition	Botany

Also check: PYQs on Nutrition in Plants

Imbibition in Germination

Treatment of Seed at Low Temperature

Abscisic Acid Controls

CBSE X Related Questions

1.
Give one example each of electrolytic decomposition and decomposition by sunlight.
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2.
(a) Study the given electric circuit in which 2 A electric current is flowing between points X and Y.

(i) Using the battery, key, voltmeter and ammeter in this given electric circuit, redraw a circuit diagram in which 2 \(\Omega\) and 4 \(\Omega\) resistors are connected between X and Y in parallel combination.
(ii) Circuit drawn by you, in which resistors are connected in parallel combination, calculate the electric current flowing through 4 \(\Omega\) resistor.
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3.
When you look at an object very close to your eyes, the:
- Ciliary muscles of your eye contract and the eye lens becomes thick.
- Ciliary muscles of your eye get relaxed and the eye lens becomes thick.
- Ciliary muscles of your eye contract and the eye lens becomes thin.
- Ciliary muscles of your eye get relaxed and the eye lens becomes thin.
View Solution
4.
The reasons for excessive generation of wastes are:
(i) Use and throw policy.
(ii) Increased availability of packaged food.
(iii) Increased construction wastes.
(iv) Non-sorting of dry and wet wastes
- (i), (iii) and (iv)
- (i), (ii) and (iii)
- (i), (ii), (iii) and (iv)
- (ii), (iii) and (iv)
View Solution
5.
Which structure in a leaf is mainly responsible for gaseous exchange?
- Xylem
- Stomata
- Phloem
- Cuticle
View Solution
6.
When an element 'X' reacts with water, it starts floating. Identify the element 'X':
- Potassium
- Calcium
- Sodium
- Iron
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