Question

1.
2.
Why is diffusion insufficient to meet the oxygen requirements of multi-
cellular organisms like humans?
What criteria do we use to decide whether something is alive?
What are outside raw materials used for by an organism?
What processes would you consider essential for maintaining life?
3.​

Answer 1

Answer:

What processes would you consider essential for maintaining life?

The various processes essential for maintaining life are nutrition, respiration, transportation, excretion, control and coordination

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Answer 2

Explanation:

Unlike unicellular organisms, multicellularcells are not in direct contact with the outsideenvironment. Therefore, diffusion simply cannot meet their oxygen requirements. Any visible movement such as walking, breathing, or growing is generally used to decide whether something is alive or not.