Nutrition in Plants Class 7 Notes – CBSE/ICSE

Last updated on June 10th, 2022 at 11:25 pm

Nutrition in Plants Class 7 Notes

Nutrition in Plants Class 7 Notes | Nutrition in Plants Class 7 Extra Questions with Answers.

Fill in the blanks:-

Insectivorous plants grow in soil that is poor in …….[nutrients]

……….are organisms that are dependent on other organisms.[ Parasites]

A ……is the result of a symbiotic relationship between algae and fungi.[ lichen]

……..plants obtain their nutrition from dead and decaying matter.[ Saprophytic]

Parasitic plants obtain their food from other living organisms called ……[host]

Light is converted into ………energy during photosynthesis.[ chemical]

Food produced by plants is stored in the form of ……….[starch]


Answer the following Questions

QUE – Name the pores through which leaves exchange gases.

ANS-  Stomata


QUE – Name the process by which plants produce food.

ANS-  Photosynthesis


QUE – Give the name of a gas that is used in photosynthesis.

ANS-  Carbon di-oxide


QUE – Name a gas that is produced during photosynthesis.

ANS-  Oxygen


QUE – Name the green pigment found in plant leaves.

ANS-  Chlorophyll


QUE – Identify a parasitic plant with a yellow, slender, tubular stem.

ANS-  Amarbel  [cuscuta ]


QUE – Define Nutrition:

The process of taking food by an organism as well as the utilization of this food by the organism is called nutrition.


QUE – Define Autotrophs:

Autotrophs are organisms that make their own food from simple substances through photosynthesis. Most green plants are autotrophs.


QUE – Define Heterotrophs:

Heterotrophs are organisms that can’t produce food by photosynthesis and must eat green plants or animals. All non-green plants and animals (including human beings) are heterotrophs.


QUE – Define Photosynthesis:

In the presence of sunlight, green plants produce food from inorganic substances like air, carbon dioxide, and water. Using sunlight energy, green plants produce their own food (like glucose) from carbon dioxide and water. Photosynthesis produces oxygen gas. Photosynthesis requires carbon dioxide, water, chlorophyll, and sunlight.


QUE – Define Starch:

The process of photosynthesis first produces a simple carbohydrate called glucose. Glucose is then converted into starch, a complex carbohydrate. Various parts of plants, including leaves, store this starch as food.


QUE – Define Chlorophyll:

The chlorophyll in leaves absorbs light energy from the sun and uses it for photosynthesis, which produces food.


QUE – Define Parasite:

A parasite is an organism that lives on or inside another organism (called a host) and derives its food from that organism. Cuscuta is an example of a parasite plant. Its Hindi name is Amarbel. There is no chlorophyll in the Cuscuta plant.


QUE – Define Insectivorous Plants:

Insectivorous plants are those that consume insects as part of their diet. Common insectivorous plants include: Pitcher plant, Sundew, Venus fly-trap and Bladderwort.An insectivorous plant consumes insects for nitrogen compounds required for its growth.


QUE – Define Symbiotic Plant:

Plants living together as if they are one plant can be called symbiotic (and such plants are called symbiotic plants).


QUE – What is the significance of algae?

According to scientists, algae generate about 87 percent of the world’s oxygen and remove excess carbon dioxide from the atmosphere. They are believed to be an important factor in preventing global warming and climatic changes.



QUE – Differentiate between autotrophs and heterotrophs

Autotrophs are organisms that prepare their food on their own and have chlorophyll. For example, green plants and algae.

Heterotrophs rely on other organisms for nutrition and do not have are animals and fungi.

Updated: 10 Jun 2022 — 11:25 pm

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