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What Is a Device Called That Provides a Precise Oxygen

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What is a device called that provides a precise oxygen concentration between 21% and 100% by mixing air and oxygen?


Definitions:

Phloem Transport

The movement of sugars and other metabolic products downwards from the leaves through the phloem.

Root

The part of a plant that typically lies below the surface of the soil, anchoring the plant and absorbing water and nutrients from the soil.

Leaf

The green, photosynthetic organ of a plant that is typically flat and thin, responsible for absorbing sunlight to synthesize nutrients.

Phytoremediation

The use of plants to remove, transfer, stabilize, and/or destroy contaminants in soil, water, or air.

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