Answer: Like us, fish also need to take in oxygen and expel carbon dioxide in order to survive. But instead of lungs, they use gills. ... As the fish opens its mouth, water runs over the gills, and blood in the capillaries picks up oxygen that's dissolved in the water.
Answer:
Explanation:
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Q1- D
q2- C
q3- B
I am assuming you only need one answer for each, good luck!
Answer:
you would see rivers and mountains.
pine peak is the highest point because there are more circles surrounding it and its also named.
it is flowing away from the ocean because fresh water fish have to swim UP river to spawn in the ocean.
i think its 20 but im not sure
Explanation:
i hope this helps :)
Answer:
Early cyanobacteria in stromatolites are thought to be responsible for increasing the amount of oxygen in the primeval Earth's atmosphere through their continuing photosynthesis. They were the first known organisms to photosynthesize and produce free oxygen.
Hope this helps!!!
