The atmosphere of early Earth is currently thought to have contained:a
methane, water, ammonia, nitrogen, and oxygen
b. carbon dioxide, water, oxygen, nitrogen, and hydrogen
c. carbon dioxide, ozone, nitric oxide, water, and hydrogen sulfide
d. carbon dioxide, water, carbon monoxide, hydrogen, and nitrogen
e. carbon dioxide, carbon monoxide, water, hydrogen, and nitric oxide
d
You might also like to view...
What happens to a molecule when it is
phosphorylated?
a. it loses energy. b. it receives a phosphate group. c. it becomes denatured. d. it loses electrons and protons. e. more than one of these happen when a molecule is phosphorylated
The process by which cells of a multicelled organism become specialized during development is called:
1.differentiation 2.transcription 3.translation 4.enhancement
Antimicrobials that are macrolides
A. include azithromycin, clarithromcyin, and erythromycin. B. disrupt cell membrane function. C. are very narrow-spectrum drugs. D. include tetracyclines. E. are hepatotoxic.
What are some ways that hypertension can kill?
What will be an ideal response?