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An object can be considered biologically alive if it meets three main qualifications(there are many 'subqualifications,' but these can be grouped in three main categories):
A) It must grow through metabolism. This means that it must ingest nutrients, in some form, and use these nutrients for self-perpetuation.
B) It must reproduce. For the longevity of its species, an organism must be capable of reproduction in some form.
C) It must adapt. An organism must be capable of endogenously originating adaptation. It must react to and change to suit its environment by changes originating of its own methods/nature.
Growth and metabolism may sometimes be listed as separate qualifications, but in most schools of thought, the intake of nutrients, and the use of those nutrients for self-perpetuation are usually grouped together.

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11y ago
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14y ago

All living things require: 1. Oxygen 2. Water 3. Energy source (e.g. food, sunlight) 4. Means to expel waste products

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11y ago

Food

Water (H2O)

Living Space

Stable Internal Conditions

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8y ago

Food, clothing, shelter and good society are four basic needs for life.

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11y ago

homeostasic, living space, food, water

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15y ago

Air, water, food & shelter

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Q: What are the four major requirements for life?
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