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Life Process is one of the most important chapters for the CBSE Class 10th Examination. Here, we are giving you Notes of NCERT chapter 6 Life process notes.

CBSE Class 10 Life Process Notes

Defination of Living Organisms for class 10th students

Those organisms that show movement, growth, division of cells, repair or heal, and maintain their structure are called Living Organisms.

Type of Movement according to Class 10 Chapter 6 Life Process

• Large Scale Movement
• Small scale movement

Nutrition – CBSE Class 10 Life Process

• Definition of Nutrition: The process of transfer of source of energy from outside to the inside of the body is called Nutrition.
• Why do organisms need Nutrition? : Every living organism on the planet needs the energy to perform any activity. And, nutrition provides energy to organisms and helps in the growth and repair of the living organism.
• What are Nutrients? Materials that provide nutrition to living organisms and give them energy to perform their work are called nutrients.
• What are Macronutrients? Carbohydrates, proteins, and fats are the main nutrients, that’s why they are called macronutrients.
• What are Micronutrients? Minerals and vitamins are required in small amounts to organisms and are therefore called micronutrients.

Also Read: Class 10th chapter light Notes

Types of Nutrition/ Modes of Nutrition

1. Autotrophic Nutrition
2. Hetrotophic Nutrition

Autotrophic Nutrition – class 10th life process

Definition: Autotrophic nutrition is a type of nutrition in which organisms prepare their own food. Green plants, blue-green algae are examples of Autotrophic Nutrition.

Autotrophs obtain their food material from inorganic sources in the form of CO2 and water (H2O) and transform these materials into carbohydrates with the help of chlorophyll and sunlight (or in the presence of chlorophyll, sunlight), and the process of converting CO2 and H2O into carbohydrate is called photosynthesis.

What are Biocatalysts class 10 biology? Biocatalysts are enzymes that increase the rate of a biochemical reaction in organisms in organisms and break down the complex substance into a simpler form.

Photosynthesis for class 10 biology?

What is Photosynthesis? Photosynthesis is the process by which green plants make their food is called photosynthesis. 

• In Photosynthesis, Plants convert solar energy into chemical energy, and this process forms carbohydrates.
• Photosynthesis takes place in green leaves.
• The green part of the plant, like leaves and green stems contains a pigment called chloroplast, chlorophyll.

Raw Materials for Photosynthesis:

• Sunlight
• Chlorophyll: Sunlight consumed by chloroplast
• CO2: Enters through stomata, and oxygen (O2) is released as a byproduct through stomata on the leaf.
• Water: Water + dissolved minerals like nitrogen, phosphorous, etc., are taken up by the roots from the soil.

How do plants get raw material for photosynthesis? 

• Plants get water from the soil, by xylem tissue presented in roots and stems.
• Plants get carbon dioxide from the leaves through stomata.

The process of Photosynthesis for Class 10th:

• The first plant absorbs light energy using chlorophyll.
• After that, the plant converts the light energy into chemical energy and breaks the water into hydrogen and oxygen.
• Plant convert the CO2 to carbohydrates.
• After that, Sunlight stimulates chlorophyll, and this leads to the splitting of the water molecule.
• The splitting of a water molecule releases hydrogen, and this hydrogen is used for the reduction of carbon dioxide to produce carbohydrates.
• Oxygen is the by-product of photosynthesis.
• Photosynthesis converts carbohydrates into starch, and leaves and stems store this.

Significance and Importance of Photosynthesis for class 10 Life process

• Photosynthesis creates oxygen which is necessary for all living beings on the planet.
• Green plants are the primary steps in the food cycle, and all living beings are directly and indirectly dependent on plants, and photosynthesis keeps the plants alive.
• Photosynthesis produces oxygen in the environment and supports maintaining the balance of CO2 and O2 in the atmosphere.

Stomata – Life Processes Class 10 Notes

• Stomata: Stomata are tiny pores present in the epidermis of the leaf or stem through which gaseous exchange and transpiration occur.

Guard Cells:

• Opening and closing of the pores of stomata is a function of the Guard cells.
• Guard cells swell when water flows into them and it opens the stomata pores.
• Pores of the stomata close when gaurd cells shrinks.

Functions of stomata – Class 10 notes life process

• Stomata Exchange gases, O2, and CO2.
• Stomata lose water in the form of water vapor during transpiration.

Heterotrophic Nutrition – class 10th life process notes

Heterotrophic nutrition is a mode of nutrition in which organisms depend on other living beings for nutrition. All living organisms, except green plants and blue-green algae, use the heterotrophic mode of nutrition. There are three types of Heterotrophic nutrition;

1. Saprophytic nutrition
2. Holozoic nutrition
3. parasitic

• Saprophytic Nutrition: In saprophytic nutrition, living organisms secrete digestive juices on the food. Food begins to be digested before it is swallowed. And after digestion, the organism ingests the food. Examples of Saprophytic Nutrition are insects, like houseflies, fungi, etc.
• Holozoic Nutrition: In Holozoic nutrition, organisms intake solid food, and digestion occurs inside the organism. Examples of Holozoic Nutrition are Humans, animals, etc.
• Parasitic Nutrition: Parasitic nutrition is a type of nutrition in which an organism gets food from a host organism without killing it. For example Cuscuta, ticks, orchids, etc.

Nutrition in Amoeba – Class 10th life process notes

• Amoeba is a unicellular organism that follows the holozoic mode of nutrition, and in Amoeba, the digestion of food follows after the ingestion of food.
• There are five steps of Holozoic nutrition,

1. Ingestion
2. Digestion
3. Absorption
4. Assimilation
5. Egestion.

Steps of Holozoic Nutrition:

1. Ingestion: Ingestion is the process of taking the food.
2. Digestion: Digestion is the process of breaking complex food substances into simple molecules.
3. Absorption: Absorption is the process of absorption of digested food.
4. Assimilation: Assimilation is the process of utilization of digested food for energy, growth, and repair.
5. Egestion: Egestion is the process of removing undigested food from the body.

We will soon release the second part of notes for class 10 chapter 6, Life Process on Study corner’s Biology section.

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