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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