LIFE PROCESSES CHAPTER - 06 QUESTIONS AND ANSWERS

Class X Chapter 6 – Life Processes Science

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.

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