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:
World Wildlife Federation (WWF)
Explanation:
They're one of the MANY organizations who help with wildlife and their habitats.
Answer:
c
Explanation:
because it's causing harm to the human but the tapeworm is benefiting from it
Answer:
is there suppose to be a pic?
Explanation: