Answer:
evolve I believe is the answer
Alveoli walls are composed of Type 1 and Type 2 alveolar cells
Answer:
A oxidation reactions are usually irreversible and form new product
and burn up
Mutualism is when both sides benefit. The hummingbird gets nectar and the flower is benefited because the hummingbird that has been to other flowers carry pollen on its body which spread the flower when it sucks its nectar, therefore pollinating the flower in the process.