Question

❤QUESTIONS ❣⤵⤵⤵⤵⤵⤵

↪1.Why is diffusion insufficient to meet the oxygen requirements of multi-
cellular organisms like humans?

↪2.What criteria do we use to decide whether something is alive?

↪3.What are outside raw materials used for by an organism?

↪4.What processes would you consider essential for maintaining life?


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Answer 1

Explanation:

ANS(1) In multicellular organisms such asman, the volume of the human body is big and hence, oxygen cannot diffuse into all the cells of the human body quickly. ... Hence, diffusion isinsufficient to meet the oxygen requirements of multicellular

ANS (2 ) Any visible movement such as walking, breathing, or growing is generally used to decide whether something is aliveor not. However, a living organism canalso have movements, which are not visible to the naked eye.

ANS (3)

An organism uses outside raw materials mostly in the form of food and oxygen. The raw materialsrequired by an organism can be quite varied depending on the complexity of the organism and its environment.

ANS (4)The various processes essential for maintaining life are nutrition, respiration, transportation, excretion, control and coordination.

Hope it helps ^_^

Answer 2

Answer:

Diffusion is unable to meet oxygen requirements of multi-cellular organisms like humans because diffusion is a slow process.

EXPLANATION:

This means that the time taken for oxygen to circulate to all body cells is more.

In addition, humans need a lot of oxygen in their cells and tissues so that the body activities can take place in the right manner and in time.

With diffusion, oxygen can’t diffuse into all body cells in a quick manner because the human body is large and has a large number of cells and tissues.