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NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants

NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants are part of NCERT Solutions for Class 7 Science. Here we have given NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants.

Board CBSE
Textbook NCERT
Class Class 7
Subject Science
Chapter Chapter 1
Chapter Name Nutrition in Plants
Number of Questions Solved 12
Category NCERT Solutions

NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants

Question 1.
Why do organisms need to take food?
Solution:
Food is needed by all living organisms for the following purposes :

  1. It is meant for the general growth and development of an organism. If it is not an insufficient amount, then it shows insufficient growth and development, along with hunger signs.
  2. It is meant to provide energy. We need energy for movements such as running, walking, or raising our arms.
  3. It is also needed by living beings for repairing of their damaged parts.
  4. It gives us resistance against diseases and protects us from infections.

Question 2.
Distinguish between a parasite and a saprotroph.
Solution:

Parasite Saprotroph

   (i) Parasite derives nutrients from living organisms.

(ii) Parasites mostly live on or in the host

They derive nutrients from dead and decaying organisms.

They live on dead and decaying stuff.

Question 3.
How would you test the presence of starch in leaves?
Solution:

  1. Take two healthy green potted plants of the same kind in order to remove all the starch from the leaves.
  2.  Keep one in the darkroom (or in a black box) for 72 hours and the other in the sunlight.
  3.  Now, take one leaf from each of the plants.
  4. Put few drops of iodine solution on each of the leaves.
  5.  The leaf kept in the sunlight will turn blue-black due to the presence of starch.
  6. The leaf kept in the dark will not turn blue-black because of the absence of starch.
    NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants image 1

Question 4.
Give a brief description of the process of synthesis of food in green plants.
Solution:
In green plants, the synthesis of food occurs by a process called photosynthesis. During photosynthesis, chlorophyll-containing cells of the leaves, use carbon dioxide and water to synthesis carbohydrates in the presence of sunlight. The process can be represented by an equation.
NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants image 2
NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants image 3
During this process, oxygen is released. The carbohydrates formed ultimately get converted into starch. The presence of starch in leaves indicates the occurrence of photosynthesis. Starch is also a carbohydrate.

Question 5.
Show with the help of a sketch that the plants are the ultimate source of food.
Solution:
NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants image 4

Question 6.
Fill in the blanks:

  1. Green plants are called ………………. since they synthesize their own food.
  2. The food synthesized by the plants is stored as ……………….
  3. In photosynthesis, solar energy is captured by the pigment called ……………….
  4. During photosynthesis plants take in ………………. and release.

Solution:

  1. autotrophs
  2. starch
  3. chlorophyll
  4. carbon dioxide, oxygen.

Question 7.
Name the following:

  1.  A parasitic plant with a yellow, slender, and tubular stem.
  2.  A plant that has both autotrophic and heterotrophic modes of nutrition.
  3. The pores through which leaves exchange gases.

Solution:

  1. Cuscuta
  2.  Pitcher plant
  3.  Stomata.

Question 8.
Tick the correct answer:
(a) Amarbel is an example of :

  1.  autotroph
  2. parasite
  3.  saprotroph
  4.  host

(b) The plant which traps and feeds on insects is :

  1.  Cuscuta
  2.  china rose
  3.  pitcher plant
  4.  rose

Solution:
(a)-2 parasite
(b)-3 pitcher plant

Question 9.
Match the items given in Column I with those in Column II :

Column I Column II
Chlorophyll Bacteria
Nitrogen Heterotrophs
Amarbel Pitcher plant
Animals Leaf
Insects Parasite
Column I Column II
Chlorophyll Leaf
Nitrogen Bacteria
Amarbel Parasite
Animals Heterotrophs
Insects Pitcher plant

Question 10.
Mark ‘T’ if the statement is true and ‘F’ if it is false :

  1.  Carbon dioxide is released during photosynthesis. (T/F)
  2.  Plants which synthesise their food themselves are called saprotrophs. (T/F)
  3. The product of photosynthesis is not a protein. (T/F)
  4.  Solar energy is converted into chemical energy during photosynthesis. (T/F)

Solution:

  1.  F
  2.  F
  3.  T
  4.  T

Question 11.
Choose the correct option from the following :
Which part of the plant takes in carbon dioxide from the air for photosynthesis?

  1. Root hair
  2. Stomata
  3. Leaf veins
  4. Sepals

Solution:
2. Stomata

Question 12.
Choose the correct option from the following:
Plants take carbon dioxide from the atmosphere mainly through their:

  1. roots
  2. stem
  3. flowers
  4. leaves

Solution:
4. leaves

NCERT Solutions for Class 7 Science

  • Chapter 1 Nutrition in Plants
  • Chapter 2 Nutrition in Animals
  • Chapter 3 Fibre to Fabric
  • Chapter 4 Heat
  • Chapter 5 Acids, Bases and Salts
  • Chapter 6 Physical and Chemical Changes
  • Chapter 7 Weather, Climate and Adaptations of Animals to Climate
  • Chapter 8 Winds, Storms and Cyclones
  • Chapter 9 Soil
  • Chapter 10 Respiration in Organisms
  • Chapter 11 Transportation in Animals and Plants
  • Chapter 12 Reproduction in Plants
  • Chapter 13 Motion and Time
  • Chapter 14 Electric Current and its Effects
  • Chapter 15 Light
  • Chapter 16 Water A Precious Resource
  • Chapter 17 Forests: Our Lifeline
  • Chapter 18 Wastewater Story

We hope the NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants help you. If you have any query regarding NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants, drop a comment below and we will get back to you at the earliest.

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