Pioneer species are the first organisms to live in an uninhabited area.
I think it would be the first ones with lower o2 because fish dont breathe oxygene
3: B Nervous system. 4: A Sensing and responding to its external environment.
Answer:run to the patient's room when code blue is called
Explanation:
<span>Organs are formed by tissues combined together.
</span><span>♡♡Hope I helped!!! :)♡♡
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