1. False 2. True hope this helps:)
Here’s the answer! get the app socratic!
Answer:
<em><u>4 main blood groups</u></em>
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Explanation:
A, B, AB and O. Your blood group is determined by the genes you inherit from your parents.
Platelets join together to form a clot to stop the bleeding. Then the platelets release a chemical called cytokines in your bloodstream to heal the cut. Your immune system is also alerted to scan for infections
