The cutting down of trees
b. trees provide everything in a rain forest ecosystem.
Coastal areas experience two high and two low tides every 24 hours and 50 minutes because the earth rotates through two tidal bulges every day. High tides occur 12 hours and 25 minutes apart.
Cyanobacteria don't need oxygen to survive they produce oxygen. They where the first ever known organisms on the planet and they produced oxygen in the oceans which was absorbed by iron deposits and then once the iron had oxygen the ocean got the oxygen until it got into the atmosphere and Eukaryota bacteria evolved. So the answer would be: <span>They convert nitrates from the water into nitrogen gas (N2) that is released into the atmosphere.</span>
