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Karolina [17]
3 years ago
9

A barrier that allows some substances in while keeping other

Biology
1 answer:
egoroff_w [7]3 years ago
5 0
C cause it let certain type particles to move threw
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If a patient has 12 of their body covered with a psoriasis rash what would be the severity
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Stromatolites are rocky structures that generally form in shallow waters from the binding of sediment by microbial biofilms. Str
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Approximately, the oldest stromatolites are 3.6 billion years old on earth.

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