Answer:
Oxygen is inhaled so that Dioxide can be exhaled, that is just how breathing functions.
Explanation:
We require this system for our survival.
Answer:
The answer is DNA (Deoxyribonucleic acid)
Explanation:
Deoxyribonucleic acid, DNA is the main genetic material found in living organisms.
- It carries information called genes that determine the traits of offsprings.
- Also, it undergoes replication in ONLY living cells, as observed with virus that carries DNA and would ONLY replicate it inside the cell of a living host.
Therefore, DNA is the important molecule that distinguishes living systems from nonliving matter
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