Biology Ruby-throated hummingbirds migrate 2,000 km every fall. Before migrating, they eat nectar and convert much of the sugar in the nectar to fat. Why is it advantageous for these birds to store energy as fat rather than as glycogen?

it's anything that aren't producers and consumers.

explanation:

you've got to be clear on what "this" is

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.