Question

What criteria is used to decide whether something is alive? Mention at least 5 points.

For Class 10th Bio...
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Answer 1

There never used to be debate over when someone was dead. If there was no heartbeat, no breathing, and no response to stimulation or resuscitation for a sufficient period of time, it was clear that the death of the person had occurred. However, in 1968, that all changed.

In 1968, the notion of “brain death” was formulated and published by an ad hoc committee of the Harvard Medical School.(1) Two years later in 1970, Kansas became the first state to give legal status to the notion of “brain death."(2) Over the past three decades, the critically important criterion for declaring death switched from the absence of circulation and breathing to cessation of functioning of the brain.

Creation of this new “brain death” was driven by several factors.
The advent of cardiac life support allowed patients to be resuscitated after, for example, a heart attack or a head injury. While these patients had a beating heart and were able to breathe, tests administered to some would allegedly find no evidence of functioning of the brain. This situation prompted some to theorize that these patients were no longer
really alive.

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Answer 2

We used some criteria ri decide something is alive are:-
#they respire
#they reproduce
#they excrete
#they move
#they need food
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