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:
c
Explanation:
plants create growth by converting sunlight into energy, but all organisms need cellular respiration
Answer:
Within the cell body is a nucleus (2), which controls the cell's activities and contains the cell's genetic material. The axon looks like a long tail and transmits messages from the cell
Explanation:
The limiting factors of an ecosystem are Habitat, Space, Resource abundance, or the reproductions<span />
