Which option describes Darwin’s theory of natural sections?
Select all that apply

1. Natural selection results in descent with modifications
2.Evolution occurs because of natural selection
3. Natural selection occurs because of evolution
4.Natural selection results in populations staying the same over time

electronic measurement tools display data on a screen after waiting for several minutes.

while some business owners prefer manual record keeping systems, most businesses use an electronic record keeping system - making it easier to capture information, generate reports and meet tax and legal reporting requirements.

explanation:

it's unlikely a majority of a large population would agree on issues

hope this : )

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.