Why is bacteria an essential part of the nitrogen cycle?

a: bacteria use the nitrogen which prevents harm to other organisms.

b: bacteria use the nitrogen that has been fixed by plants to create atmospheric nitrogen.

c: bacteria are responsible for fixing nitrogen into usable forms for other organisms.

d: bacteria, through assimilation, absorb nitrates or ammonium ions from the soil.

Which part of cellular respiration must occur before any of the other steps can occur

The graph shows the amount of global warming happening in different ecosystems. which populations of organisms will likely decline the most as a result of climate change, and why? a.coral reefs because of the loss of the symbiotic algae living within their bodies b.penguin populations because the fish they eat will move into warmer waters c.mountain-dwelling birds because rising sea levels will relocate their food sources d.large cats in the rainforest because of decreased habitat loss for their prey

Suppose you are provided with an actively dividing culture of e. coli bacteria to which radioactive thymine has been added. what would happen if a cell replicates once in the presence of this radioactive base?