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GREYUIT [131]
3 years ago
10

Someone help me pleaseeee

Biology
2 answers:
Rudik [331]3 years ago
8 0

Answer:

B

Explanation:

oxygen and carbon dioxide

Zielflug [23.3K]3 years ago
5 0

Answer:

oxygen and carbon dioxide

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mestny [16]

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Question 2.

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Ipatiy [6.2K]
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marishachu [46]

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3 years ago
A first-hand source such as an experiment is called a _____.
IrinaK [193]
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