Answer:
Moist walls - gases dissolve in the moisture helping them to pass across the gas exchange surface. Permeable walls - allow gases to pass through. Extensive blood supply - ensuring oxygen rich blood is taken away from the lungs and carbon dioxide rich blood is taken to the lungs.
Answer:
1 quarter of a million especially young men who have dependents to go into the forestry and flood prevention work.
It just depends what you are studing:
1: D
2: C
Plants don’t need respiration. Animals need to eat.
<span>neither habitat destruction has nothing to do with geothermal energy.
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