4. On an expedition to Antarctica, scientists have discovered fossils of plants that are found in tropical rainforests. What statement best explains this discovery? -Tropical plants grow on Antarctica during summer months.
-Antarctica used to be located closer to the equator.
- Fossilized remains were carried by ocean currents.
-The ice age froze the tropical plants in ice. .​

Antarctica used to be located closer to the equator.

Explanation:

The statement that best explains the discovery of fossils of plants found in tropical rainforests in Antarctica is "Antarctica used to be located closer to the equator."

According to geological history, during the Rodinia age around 1 billion years ago, the Antarctica continent can be found near the position of the equator, thereby making it experience a favorable tropical climate in the past.

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.

i think it is dna, i'm not totally sure but i think it might be.