Answer:
The correct answer is:
C. Blood vessels run around bones and not through.
Answer:
a
Explanation:
its a semi permeable membrane. it chooses what can go in and out so nothing bad happens.
Answer:
1. give up 1
2. give up 2
3. give up 3
4. gain 3
5. gain 2
6. gain 1
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Answer:
D
Explanation:
Bacteria, air, animals, plants
