Chapter 6 Life Processes Notes
These Chapter 6 Life Processes Notes will help you fetch good marks in your CBSE Board Exam. Go through the notes sincerely and help yourself get good marks.
What are Life Processes?
All living things need to perform some basic functions to sustain their life. The basic processes or functions performed to maintain their life are called Life Processes.
Baisc Life Processes common to all living things-
- Control and Coordination
Features of Living Things
What are the main features of Living Things (Organisms)?
- Response to Stimulus
- Growth and Development
- Movement and locomotion
Define the following terms – Life Processes, Stimulus, Response, Metabolism, food?
What is stimulus (stimuli)?
Any change in the environment is called stimulus.
What is Response?
The reaction of the organisms according to the stimulus is called Response.
What is Metabolism?
It is the total bio-chemical reactions that is taking place in the body of an organism is called metabolism.
The substances that are essential for performing life activities are called foods.
- Also Read: Biology Objective Questions and Answers
Function of Food
What is the function of food?
- provide energy for different metabolic activities
- forming of structural component of the body
- repairing of damage cells and tissues
- protection from diseases
- develops immunity
What is Nutrition?
Nutrition is a process of intake of nutrients and its utilization by an organism.
Nutrients can be defiend as a substance whuch an organism obtains from its surroundings and utilizes it as a source of energy. Carbohydrates, Fats, Proteins, Minerals, Vitamins and Water are the nutrients required by every organism for the biosynthesis of its body.
Macro-Nutrients- required in large quantities like Carbohydrates, Fats, Proteins
Micronutrients- required in small quantities like Vitamins and Minerals
Modes of Nutrition
Define Mode of Nutrition?
Mode of Nutrition is a process or means by which an organism obtains its food. All organisms do not obtain the food in the same manner.
Depending on the method of obtaining food by an organism, the oragnisms can be classified into two categories-
Autotrophic Mode of Nutrition
What is Autotrophic Nutrition?
Auto means Self and Trophe means Nutrition. So, Autrotrophic means Self Nutrition.
Autotrophic nutrition is that mode of nutrition in which an organism makes its own food from the simple inorganic materials like CO2 and water with the help of sunlight.
The organisms that prepare their own food are called Autotrophs.
Types of Autotrophic Nutrition
- Photo Autotrophic: Organisms derive energy from sunlight (photosynthesis). Ex- Green Plants
- Chemo Autotrophic: Organisms derive energy from chemicals (Chemosynthesis). Ex- Some Bacteria, Blue Green Algae
Heterotrophic Mode of Nutrition
What is Heterotrophic Nutrition?
Heterotrophic mode of nutrition is that mode of nutrition in which the organisms cannot make their own food. A heterotrophic organism is a consumer that is it derives its nutrition from others.
Animals belonging to the heterotrophic mode of nutrition are called heterotrophic organisms or Heterotrophs.
Types of Heterotrophic Nutrition
- Saprotrophic Nutrition
- Parasitic Nutrition
- Holozoic Nutrition
It is the process of releasing energy from food.
Word Equation of Respiration Process
Food + Oxygen → Carbon dioxide + Water + Energy
Respiration is very important for an organism as it helps in carrying out the life processes.
Respiration in Human Beings
For carrying out the process of respiration, Human Respiratory System is involved.
Respiration in Plants
Transporation in Human Beings
Transporation in Plants
Excretion in Human Beings
Excretion in Plants
to be updated soon