Solved

As Oxygen Appeared in the Atmosphere, ________ Also Accumulated, Which

Question 24

Multiple Choice

As oxygen appeared in the atmosphere, ________ also accumulated, which formed a protective barrier that protects the Earth from ________.

A) ozone / UV radiation
B) elemental sulfur / volcanism
C) ferrous iron / hydroxylating radicals
D) sulfate / hydrogen sulfide

Related Questions

Q19: The establishment of DNA as the genome

Q20: Horizontal gene transfer<br>A) is so rare over

Q21: Molecular sequencing suggests that mitochondria arose from

Q22: Evolution is driven by<br>A) random mutation.<br>B) novel

Q23: A type strain is the first strain

Q25: Which taxonomic tool would scientists use if

Q26: The oxic atmosphere created conditions that led

Q27: One phenotypic trait used for species identification

Q28: You have isolated a microbe from an

Q29: One widely used method of examining evolutionary