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Stem Cells Are

question 74

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Stem cells are:


Definitions:

Helium

A chemical element with symbol He, the second lightest element, known for being a colorless, odorless, tasteless, non-toxic, inert gas.

Open System

A system that exchanges both energy and matter with its surroundings, characteristic of most natural and biological systems.

Closed System

A physical system that does not exchange matter with its surroundings, though it may exchange energy.

Penetrating Radiation

Radiation that can penetrate through substances and materials, potentially causing ionization of atoms.

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