Nutrition in Plants - Class 7 - Science
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Back Questions - Nutrition in Plants | NCERT | Science | Class 7
Why do organisms take food?
All organisms need food to obtain energy for growth and maintenance of their body.
Food provides essential nutrients necessary for various bodily functions.
Nutrients from food help in building and repairing body parts, ensuring proper health and functioning of organisms.
Distinguish between a parasite and a saprotroph.
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Sign up nowHow would you test the presence of starch in leaves?
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Sign up nowGive a brief description of the process of synthesis of food in green plants.
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Sign up nowFill 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.
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Sign up nowName the following:
(i) A parasitic plant with yellow, slender and branched stem.
(ii) A plant that is partially autotrophic.
(iii) The pores through which leaves exchange gases.
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Sign up nowCuscuta is an example of:
(i) autotroph
(ii) parasite
(iii) saprotroph
(iv) host
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Sign up nowThe plant which traps and feeds on insects is:
(i) Cuscuta
(ii) china rose
(iii) pitcher plant
(iv) rose
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Sign up nowMatch 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 |
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Sign up nowMark ' $T$ ' 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)
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Sign up nowWhich part of the plant takes in carbon dioxide from the air for photosynthesis?
(i) Root hair
(ii) Stomata
(iii) Leaf veins
(iv) Petals
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Sign up nowPlants take carbon dioxide from the atmosphere mainly through their:
(i) roots
(ii) stem
(iii) flowers
(iv) leaves
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Sign up nowWhy do farmers grow many fruits and vegetable crops inside large green houses? What are the advantages to the farmers?
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Sign up nowExtra Questions - Nutrition in Plants | NCERT | Science | Class 7
What is the mode of nutrition called where organisms make their own food from simple substances?
The mode of nutrition where organisms make their own food from simple substances is called autotrophic nutrition. Organisms that utilize this mode are known as autotrophs. They utilize water, carbon dioxide, and minerals, along with sunlight and chlorophyll in the leaves, to synthesize food through a process known as photosynthesis. This is a unique process that converts solar energy into chemical energy, enabling these organisms to produce their own nutrients and thus support themselves and the broader ecosystem.
Why are plants considered autotrophs?
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Sign up nowDefine the term 'heterotrophs' and give an example.
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Sign up now________ are called the food factories of the plants.
A. roots
B. leaves
C. fruits
D. flowers
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