5. W
rel
3. Which statement is true? SCREES
White dwarf stars are the hottest and
most luminous stars,
In the main sequence, hotter stars are
more luminous
© Red dwarts. giants, and supergiants
have similar luminosity
Supergiants tend to be very hot but
have lone luminosity

chordata is the answer

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.

the index of refraction of the second medium is higher. i just took the test trust me !