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Topics: Heart, Blood, Oxygen Pages: 18 (3464 words) Published: April 23, 2014
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NCERT Solutions for Class 10th Science: Chapter 6 Life Processes July 19, 2012 | Filed under: 10th Class,Book Solutions,Science | Posted by: Anand Meena NCERT Solutions for Class 10th Science: Chapter 6 Life Processes National Council of Educational Research and Training (NCERT) Book for Class 10 Subject: Science

Chapter: Chapter 6 – Life Processes
Class 10 NCERT Science Text Book Chapter 6 Life Processes is given below. Question 1:
Why is diffusion insufficient to meet the oxygen requirements of multi-cellular organisms like humans? Answer
Multicellular organisms such as humans possess complex body designs. They have specialised cells and tissues for performing various necessary functions of the body such as intake of food and oxygen. Unlike unicellular organisms, multicellular cells are not in direct contact with the outside environment. Therefore, diffusion cannot meet their oxygen requirements. Question 2:

What criteria do we use to decide whether something is alive? Answer
Any visible movement such as walking, breathing, or growing is generally used to decide whether something is alive or not. However, a living organism can also have movements, which are not visible to the naked eye. Therefore, the presence of life processes is a fundamental criterion that can be used to decide whether something is alive or not. Question 3:

What are outside raw materials used for by an organism?
Answer
An organism uses outside raw materials mostly in the form of food and oxygen. The raw materials required by an organism can be quite varied depending on the complexity of the organism and its environment. Question 4:

What processes would you consider essential for maintaining life? Answer
Life processes such as nutrition, respiration, transportation, excretion, etc. are essential for maintaining life.

Question 1:
What are the differences between autotrophic nutrition and heterotrophic nutrition? Answer

Question 2:
Where do plants get each of the raw materials required for photosynthesis? Answer
The following raw materials are required for photosynthesis: The raw material CO2 enters from the atmosphere through stomata. Water is absorbed from the soil by the plant roots.
Sunlight, an important component to manufacture food, is absorbed by the chlorophyll and other green parts of the plants. Question 3:
What is the role of the acid in our...
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