Ventilation systems are needed in a <span>multicellular organism to actually obtain oxygen and give out carbon dioxide. Without this ventilation system, it would be very difficult for multicellular organisms to survive. It has been also observed that surface diffusion is not enough for a multicellular organism to breath.</span>
Answer:
D. A joint in the spine that is slightly movable and separated by cartilage.
Explanation:
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Answer:
C. The reactions take up too much space in the cell if the enzymes are missing.
Explanation:
Number 1 is true the second one is true the third is true number 4 is true and lastly number 5 is false I hope this helps you but I’m very confident!
