Basalt, formed from magma, contains iron-rich minerals. why is basalt important?
a. iron is magnetic and it triggers the reversal of earth's magnetic field.
b. iron is rich in nutrients and makes the soil easily identifiable.
c. iron is magnetic and records the orientation and direction of earth's magnetic field.

step 1: replication fork formation.

step 2: primer binding.

step 3: elongation.

step 4: termination.

explanation:

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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.