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seropon [69]
3 years ago
14

A lens located directly above the stage. Many microscopes have more than one objective to provide a range of

Biology
1 answer:
Stella [2.4K]3 years ago
4 0

Answer:

Objective lens

Explanation:

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The average adult, when resting, inhales and exhales about 7 or 8 liters of air per minute. That totals about 11,000 liters of air per day. Inhaled air is about 20-percent oxygen. Exhaled air is about 15-percent oxygen.

Explanation:

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Embryos are an evolutionary adaption of
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3 years ago
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