NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants

NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants

Edited By Irshad Anwar | Updated on Feb 16, 2024 05:57 PM IST

NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants: Earlier, you studied the fact that all living organisms require food and the main differences between plants and animals. In Class 7 Science Chapter 1, you will also study the different complex chemical substances, such as carbohydrate, which are the products of photosynthesis, and oxygen, which is the molecule that is produced during photosynthesis. Nutrition in Plants Class 7 Solutions provide answers to each question in the NCERT Textbook. This solution is part of NCERT Solutions for Class 7. Scroll down to go through the questions and answers given in NCERT Solutions for Class 7 Science Chapter 1.

After going through Nutrition in Plants Class 7, you must be able to understand all the concepts. In NCERT Solutions for Class 7 Science Chapter 1, you will learn that plants can synthesise food for themselves, but animals, including humans, cannot. They get it from plants or animals that eat plants. Thus, humans and animals are directly or indirectly dependent on plants. You need to study the complete NCERT Class 7 Science Chapter 1 carefully, then only you will understand the NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants.

Class 7 Science Chapter 1 Question Answer contains all the questions based on the nutrition of plants and their mechanisms. You will study in Science Class 7 Chapter 1 that all organisms need food and utilise it to get energy for the growth and maintenance of their body and all the green plants synthesize food for themselves by a process called photosynthesis. That's why they are called autotrophs. There are a few plants that take food from the host plant instead of making it inside. If you need help in finding NCERT solutions of book to any other class, then don't worry NCERT Solutions will help you out. Students are recommended to go through NCERT Solutions for Class 7 to score high marks in their examination.

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NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants: Solved Exercise Questions:

Nutrition in Plants Class 7 Questions and Answers:

Q1. Why do organisms take food?

Answer:

Organisms take food to:

(i) Get the energy to carry out life processes.

(ii) Build thier bodies.

(iii) To grow.

(iv) Repair damaged parts of their bodies.

Nutrition in Plants Class 7 NCERT Solutions:

Q2. Distinguish between a parasite and a saprotroph.

Answer:

Difference between Parasites and Saprotrophs:

Parasites Saprotrophs
A parasite derives its nutrients from the living organism and it deprives the host of valuable nutrients. For example, Mosquito. Saprotroph organisms take in nutrients from dead and decaying matter. For example, Fungi.

Class 7 Science Chapter 1 Question Answer:

Q3. How would you test the presence of starch in leaves?

Answer:

To test the presence of starch in leaves: Perform iodine test by adding iodine solution to the leaves, if there is starch present on the leaves then iodine makes a complex of dark blue color with the starch.

Hence we can test the presence of starch in the leaves.

Nutrition in Plants Class 7 Solutions:

Q4. Give a brief description of the process of synthesis of food in green plants.

Answer:

The leaves have a green pigment called chlorophyll. It helps leaves to capture the energy of the sunlight. This energy is used to synthesize (prepare) food (carbohydrates) from carbon dioxide and water. Since the synthesis of food occurs in the presence of sunlight, it is called photosynthesis.

The process equation as follows:

1653596010584

Class 7 Science Chapter 1 NCERT Solutions:

Q5 . Show with the help of a sketch that plants are the ultimate source of food.

Answer:

Following is the Food chain diagram to show that plant is the ultimate source of food:

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Class 7 Nutrition in Plants NCERT Solutions:

Q6. Fill in the blanks:

(a) Green plants are called _________________ since they synthesise their own food.

(b) The food synthesised by plants is stored as _________________.

(c) In photosynthesis solar energy is absorbed by the pigment called ___________.

(d) During photosynthesis plants take in ______________________ and release __________________ gas.

Answer:

(a) Green plants are called autotrophs since they synthesise their own food.

(b) The food synthesised by plants is stored as starch.
(c) In photosynthesis solar energy is absorbed by the pigment called chlorophyll .
(d) During photosynthesis plants take in carbon dioxide and release oxygen gas.

Class 7 Science Ch 1 Question Answer

Q7. Name the following:

(i)A parasitic plant with yellow, slender and branched stem.

Answer:

Cuscuta (Amarbel) is a parasitic plant with yellow, slender and branched stem.

Q7. Name the following :

(ii) A plant that is partially autotrophic.

Answer:

Pitcher plant is partially autotrophic plant.

As Pitcher plant is an insectivorous plants and insectivorous plants are not complete autotrophs but are partially autotrophs.

Q7. Name the following :

(iii) The pores through which leaves exchange gases.

Answer:

Stomata pores are responsible through which leaves exchange gases.

NCERT Solution of Class 7th Chapter 1:

Q8. Tick the correct answer:

Cuscuta is an example of : (i) autotroph (ii) parasite (iii) saprotroph (iv) host

Answer:

Cuscuta is an example of :

(iI) parasite

Q8. Tick the correct answer:

(b) The plant which traps and feeds on insects is: (i) Cuscuta (ii) china rose (iv) pitcher plant (iv) rose

Answer:

The plant which traps and feed on insects is:

(iv) pitcher plant

Nutrition in Plants for Class 7 Questions with Answers:

Q9. Match the items given in Column I with those in Column II:
Column I Column II
Chlorophyll Rhizobium
Nitrogen Heterotrophs
Cuscuta Pitcher plant
Animals Leaf
Insects Parasite

Answer:

Match the columns:

Column I Matched Column II
Chlorophyll Leaf
Nitrogen Rhizobium
Cuscuta Parasite
Animals Heterotrophs
Insects Pitcher plant

Class 7 Science Chapter 1 Solution:

Q10. Mark ‘T’ if the statement is true and ‘F’ if it is false:

(i) Carbon dioxide is released during photosynthesis. (T/F)

(ii) Plants which synthesise their food are called saprotrophs. (T/F)

iii) The product of photosynthesis is not a protein. (T/F)

(iv) Solar energy is converted into chemical energy during photosynthesis. (T/F)

Answer:

(i) False , Oxygen is released during photosynthesis.

(ii) False , Plants which synthesise their food are called autotrophs.

(iii) True , The product of photosynthesis is not a protein.

(iv) True , Solar energy is converted into chemical energy during photosynthesis.

Science Chapter 1 Class 7 Solutions:

Q11. Choose the correct option from the following:

Which part of the plant takes in carbon dioxide from the air for photosynthesis?

(i) Root hair (ii) Stomata (iii) Leaf veins (iv) Petals

Answer:

(ii) Stomata takes in carbon dioxide from air for photosynthesis.

Class 7 Science Chapter 1 Question Answer:

Q12. Choose the correct option from the following:

Plants take carbon dioxide from the atmosphere mainly through their:

(i) roots (ii) stem (iii ) flowers (iv) leaves

Answer:

(iv) leaves takes carbon dioxide from the atmosphere.

Class 7 Science Chapter 1 Question Answer

Q13. Why do farmers grow many fruits and vegetable crops inside large green houses? What are the advantages to the farmers?

Answer:

Farmers grow fruits and vegetable crops inside large greenhouse because it protects it from high blowing wind, and rodents also greenhouse protects the plant from the climatic conditions of outside and it can have its own suitable temperature for the growth of plants.

Farmers get advantages of the following things:

(i) They have control over their climatic conditions (Temperature, humidity etc.)

(ii) Free from pests, rodents and also from birds and animals so they have increased producibility.

NCERT Solutions for Class 7 Science Chapter 1 – Nutrition in Plants

Important Topics in Class 7 Science Chapter 1 Nutrition in Plants:

SectionTopic Name
1Nutrition in Plants
1.1MODE OF NUTRITION IN PLANTS
1.2PHOTOSYNTHESIS — FOOD MAKING PROCESS IN Plants
1.3OTHER MODES OF NUTRITION IN PLANTS
1.4SAPROTROPHS
1.5How NUTRIENTS ARE REPLENISHED IN THE Soil?

What are the benefits of NCERT solutions for Class 7 Science Chapter 1 Nutrition in Plants:

  • Nutrition in Plants Class 7 Solutions will also boost your knowledge.
  • NCERT is the basis of your learning.
  • NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants will also help you to understand all the concepts easily.
  • You will get all the answers to Science Chapter 1 Class 7 and it will help you score good marks in your school exam.
  • Nutrition in Plants Class 7 NCERT Solutions PDF is easy to download and use offline.
  • The Solutions for Ch 1 Science Class 7 are prepared by subject experts as per the latest CBSE syllabus.

If you are facing any issue in understanding the answers to the above questions, then don't worry and again go through that NCERT book and try to understand all the concepts of every topic, and then write the answers to all these questions on your own and then compare them with NCERT solutions for Class 7 Science chapter 1 Nutrition in Plants. You will see that your knowledge, as well as your understanding of these concepts, will increase, and you will be able to explain the answers in a better way.

NCERT Solutions for Class 7th Science: Chapter-Wise

NCERT Solutions for Class 7: Subject Wise

Also Check NCERT Books and NCERT Syllabus here:

We hope you will ace your examination with the help of NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants.

Frequently Asked Questions (FAQs)

1. What is nutrition class 7?

Nutrition is a process in which any organism obtains its food to lead a life .There are two types of nutrition: autotrophic and heterotrophic .

2. What are the topics covered in NCERT Class 7 Science chapter 1?

Here are the topics covered in NCERT Class 7 Science chapter 1

  • Mode of Nutrition in Plants 
  • Photosynthesis -Food Making Process in Plants 
  • other Modes Of Nutrition in Plants 
  • Saprotrophs 
  • How Nutritions are Replenished In the Soil 
3. How many questions are given in NCERT Class 7 Science Chapter 1 exercise?

There are 13 questions in NCERT Class 7 Science chapter 1

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A block of mass 0.50 kg is moving with a speed of 2.00 ms-1 on a smooth surface. It strikes another mass of 1.00 kg and then they move together as a single body. The energy loss during the collision is

Option 1)

0.34\; J

Option 2)

0.16\; J

Option 3)

1.00\; J

Option 4)

0.67\; J

A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1 m 1000 times.  Assume that the potential energy lost each time he lowers the mass is dissipated.  How much fat will he use up considering the work done only when the weight is lifted up ?  Fat supplies 3.8×107 J of energy per kg which is converted to mechanical energy with a 20% efficiency rate.  Take g = 9.8 ms−2 :

Option 1)

2.45×10−3 kg

Option 2)

 6.45×10−3 kg

Option 3)

 9.89×10−3 kg

Option 4)

12.89×10−3 kg

 

An athlete in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can be estimated to be in the range

Option 1)

2,000 \; J - 5,000\; J

Option 2)

200 \, \, J - 500 \, \, J

Option 3)

2\times 10^{5}J-3\times 10^{5}J

Option 4)

20,000 \, \, J - 50,000 \, \, J

A particle is projected at 600   to the horizontal with a kinetic energy K. The kinetic energy at the highest point

Option 1)

K/2\,

Option 2)

\; K\;

Option 3)

zero\;

Option 4)

K/4

In the reaction,

2Al_{(s)}+6HCL_{(aq)}\rightarrow 2Al^{3+}\, _{(aq)}+6Cl^{-}\, _{(aq)}+3H_{2(g)}

Option 1)

11.2\, L\, H_{2(g)}  at STP  is produced for every mole HCL_{(aq)}  consumed

Option 2)

6L\, HCl_{(aq)}  is consumed for ever 3L\, H_{2(g)}      produced

Option 3)

33.6 L\, H_{2(g)} is produced regardless of temperature and pressure for every mole Al that reacts

Option 4)

67.2\, L\, H_{2(g)} at STP is produced for every mole Al that reacts .

How many moles of magnesium phosphate, Mg_{3}(PO_{4})_{2} will contain 0.25 mole of oxygen atoms?

Option 1)

0.02

Option 2)

3.125 × 10-2

Option 3)

1.25 × 10-2

Option 4)

2.5 × 10-2

If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will

Option 1)

decrease twice

Option 2)

increase two fold

Option 3)

remain unchanged

Option 4)

be a function of the molecular mass of the substance.

With increase of temperature, which of these changes?

Option 1)

Molality

Option 2)

Weight fraction of solute

Option 3)

Fraction of solute present in water

Option 4)

Mole fraction.

Number of atoms in 558.5 gram Fe (at. wt.of Fe = 55.85 g mol-1) is

Option 1)

twice that in 60 g carbon

Option 2)

6.023 × 1022

Option 3)

half that in 8 g He

Option 4)

558.5 × 6.023 × 1023

A pulley of radius 2 m is rotated about its axis by a force F = (20t - 5t2) newton (where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is 10 kg m2 , the number of rotations made by the pulley before its direction of motion if reversed, is

Option 1)

less than 3

Option 2)

more than 3 but less than 6

Option 3)

more than 6 but less than 9

Option 4)

more than 9

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