Cyanobacteria produce from nitrogen gas as part of the nitrogen cycle. Only about percent of Earth's water is available to be consumed by humans or used for agriculture.
Animals can't consume nitrates directly. They must obtain nitrogen by plants or other herbivore animals.
from forest fires and volcanoes, as well as the decay of dead plants and animals, causes a type of pollution from carbon oxides.
One of the primary reasons that freshwater is unevenly distributed around the world is due to variation in amounts of .

Amylase is an enzyme found in the human digestive system. why do you think it was important to keep the enzyme temperature about 37 degrees celsius (98.6 degrees f)? describe what might happened the temperature decreased by 10 degrees celsius.

The endoplasmic reticulum (er) is an organelle in some cells. in these cells, it is continuous with the nuclear membrane and forms a large part of the cell\'s total membrane. sort the phrases below as describing rough er, smooth er, both, or neither. note: if you answer any part of this question incorrectly, a single red x will appear indicating that one or more of the phrases are sorted incorrectly.1) found in prokaryites and uekaryotys2) involved in protein synthesis3) involve in lipid synthesis4) contains molecular chaperones in lumen5) bound with ribosomes6) involved in toxin or drug metabolism7) large systemot internnected tubules,vesicles, and sacs8) "packages" enzymes in vesicles for secretion.

What will happen if deforestation continue to destroy the green plant on the planet