NCERT Solutions Class 7th Science Chapter – 1 Nutrition in Plants Question & Answer

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

TextbookNCERT
Class 7th
Subject Science
Chapter1st
Chapter NameNutrition in Plants
CategoryClass 7th Science
Medium English
SourceLast Doubt
NCERT Solutions Class 7th Science Chapter – 1 Nutrition in Plants Question & Answer What type of fertilizers are used?, Why do plants need nitrogen?, Why do plants need calcium?, What is the plant nutrition theory?, Which nutrient is most common in plants?, What are the 4 types of nutrition?, What nutrients are only found in plants?

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

Chapter – 1

Nutrition in Plants

Question & Answer

Q. 1. Why do organisms take food?
Answer – Food is needed by all organisms for many purposes:
(a) The main function of food is to help in growth.
(b) Food provides energy for movements such as running, walking or raising our arm.
(c) Food is also needed for replacement and repairing damaged parts of body.
(d) Food gives us resistance to fight against diseases and protects us from infections
Q. 2. Distinguish between a parasite and a saprotroph.
Answer –
ParasiteSaprotroph
(1) Parasite feeds on a living organism.(0) They feed on dead and decaying organism.
(i) The organism on which it feeds is called host.(i) They do not feed on a living organism.
Q. 3. How would you test the presence of starch in leaves?
Answer – The presence of starch in leaves can be tested by Iodine test. When we remove chlorophyll from leaf by boiling it in alcohol and then put 2 drops of iodine solution, its colour change to blue indicates the presence of starch.
Q. 4. Give a brief description of the process of synthesis of food in green plants.
Answer – The green plants have chlorophyll in the leaves. The leaves use C02 and water to make food in presence of sunlight.

Q. 5. Show with the help of a sketch that the plants are the ultimate source of food.

Answer –

Q. 6. Fill in the blanks:
(a) Green plants are called ________________ since they synthesise their own food.
(b) The food synthesised by the plants is stored as ________________ .
(c) In photosynthesis solar energy is captured by the pigment called ________________
(d) During photosynthesis plants take in ________________ and release ________________ .
Answer – (a) autotrophs (b) starch (c) chlorophyll (d) carbon dioxide, oxygen
Q. 7. Name the following:
(i) A parasitic plant with yellow, slender and branched stem.
Answer – cuscuta

(ii) A plant that partially autotrophic.


Answer – pitcher plants.

(iii) The pores through which leaves exchange gases.
Answer – Stomata

Q. 8. Tick the correct answer:
(a) Cuscutais an example of:
(i) Autotroph
(ii) Parasite
(iii) Saprotroph
(iv) Host
Answer – Parasite

(b) The plant which traps and feeds on insects is:
(i) Cuscuta
(ii) China rose
(iii) Pitcher plant
(iv) Rose
Answer – Pitcher plant

Q. 9. Match the items given in Column I with those in Column II:
Column IColumn II
ChlorophyllBacteria
NitrogenHeterotrophs
AmarbelPitcher plant
AnimalsLeaf
InsectsParasite

Answer –

Column IColumn II
ChlorophyllLeaf
NitrogenBacteria
AmarbelParasite
AnimalsHeterotrophs
InsectsPitcher plant
Q. 10. 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 themselves 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 – (a) F (ii) F (iii) T (iv) T

Q. 11. 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) Sepals
Answer – (ii) Stomata
Q. 12. 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
Q. 13 Why do farmers grow many fruits and vegetable crops inside large green houses? What are the advantages to the farmers?
Answer – Because of that green house birds, rodents, pests can’ t come inside to eat crops
NCERT Solution Class 7th Science All Chapters Question Answer
Chapter – 1 Nutrition in Plants
Chapter – 2 Nutrition in Animals
Chapter – 3 Heat
Chapter – 4 Acids, Bases and Salts
Chapter – 5 Physical and Chemical Changes
Chapter – 6 Respiration in Organisms
Chapter – 7 Transportation in Animals and Plants
Chapter – 8 Reproduction in Plants
Chapter – 9 Motion and Time
Chapter – 10 Electric Current and Its Effects
Chapter – 11 Light
Chapter – 12 Forests: Our Lifelin
Chapter – 13 Wastewater Story
NCERT Solution Class 7th Science All Chapters Notes
Chapter – 1 Nutrition in Plants
Chapter – 2 Nutrition in Animals
Chapter – 3 Heat
Chapter – 4 Acids, Bases and Salts
Chapter – 5 Physical and Chemical Changes
Chapter – 6 Respiration in Organisms
Chapter – 7 Transportation in Animals and Plants
Chapter – 8 Reproduction in Plants
Chapter – 9 Motion and Time
Chapter – 10 Electric Current and Its Effects
Chapter – 11 Light
Chapter – 12 Forests: Our Lifeline
Chapter – 13 Wastewater Story

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