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Home » Class 10 » Life processes » Autotrophic Nutrition

Autotrophic Nutrition

Last Updated on May 4, 2020 By Mrs Shilpi Nagpal 10 Comments

Question 1 Name the cellular organelle where photosynthesis occur?

Question 2 Define the term nutrition?

Question 3 Name two modes of nutrition?

Question 4 Define photosynthesis?

Question 5 What is autotrophic mode of nutrition?

Question 6 Give the function of stomata?

Question 7 Why are plants green?

Question 8 Write a chemical equation to show the process of photosynthesis in plants?

Question 9 What is the role of chlorophyll in photosynthesis?

Question 10 What are the necessary conditions of photosynthesis?

Question 11 Write the three main steps of photosynthesis?

Question 12 What are guard cells?

Question 13 What are the end products of photosynthesis?

Nutrition

The process of taking in food and utilising it is called nutrition.

A nutrient is a substance which an organism obtain from its surrounding and uses it as a source of energy.

Modes of nutrition

Autotrophic nutrition

In autotrophic nutrition,the organism makes its own food from inorganic raw material like carbon dioxide and water present in the surrounding by using sunlight.

For Example : Green plants,autotrophic bacteria.

Those organism which can make their own food from carbon dioxide and water is called autotrophs.

Green plants contain green pigment called chlorophyll which is capable of trapping sunlight energy.

The process by which green plants make their own food from carbon dioxide and water in the presence of chlorophyll is called photosynthesis.

photosynthesis class 10

1)The carbon dioxide gas is taken from air,water is taken from soil,sunlight provide energy required to carry out chemical reaction,chlorophyll helps in absorbing energy from sunlight.

2)The carbon dioxide enters the leaves through tiny pores called stomata, water is transported to leaves from soil through stem and roots.

3)The end product of photosynthesis are oxygen and glucose.

4)The extra glucose is converted into starch (Carbohydrates).It is stored in the leaves of plants.

 Photosynthesis take place in 3 steps

1)Absorption of light energy by chlorophyll.

2)Conversion of light energy into chemical energy and spitting of water into hydrogen and oxygen.

3)Reduction of carbon dioxide into carbohydrates.

 Chlorophyll is present in cell organelle called chloroplast.It is the site of photosynthesis. 
stomata
Stomata
 Stomata is present at the surface of leaves.The stomatal pores are surrounded by guard cells.They control opening and closing of stomata.

1)When water flows in the guard cell,it swells,become curve and pores open.

2)When it loses water,guard cell shrink,become straight and pores closes.

The gaseous exchange in plant take place through stomata.

In broad leave plants,stomata is present in lower surface.

In narrow leave plants,stomata is present on lower as well as upper surface.

Filed Under: Class 10, Life processes Tagged With: autotrophic nutrition, chlorophyll, chloroplast, guard cells, nutrient, nutrition, photosynthesis, stomata

About Mrs Shilpi Nagpal

Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. She has started this educational website with the mindset of spreading Free Education to everyone.

Reader Interactions

Comments

  1. Rohit Raj says

    May 20, 2018 at 8:05 am

    So thanks for ques/ans

    Reply
  2. Prince says

    July 22, 2018 at 11:46 pm

    Thankssss

    Reply
  3. Sheikh ique says

    November 1, 2018 at 12:34 pm

    Thank you so much very helpful.

    Reply
  4. Hemalatha says

    February 10, 2019 at 6:54 pm

    Tq soooooo much..

    Reply
  5. Rewant sharma says

    March 7, 2019 at 7:45 pm

    Very helpful and informative thanks for all of your website

    Reply
  6. Keren says

    September 14, 2019 at 2:46 pm

    Very useful tq so much✌️

    Reply
  7. Archie kaur says

    April 11, 2020 at 2:15 pm

    Very helpfull

    Reply
  8. Rahul says

    June 24, 2020 at 11:25 pm

    Very useful

    Reply
  9. fbs says

    September 15, 2020 at 12:17 am

    Good one well done thanks

    Reply
  10. Amit gupta says

    January 7, 2021 at 7:23 pm

    This very helpful for me short definition and notes of autotrophic

    Reply

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