Check the items you included in your answer. both living things and biotic factors can be alive. unlike living things, biotic things may not be alive; they may have once lived or came from something living. i included an example of something both living and biotic, such as flowers. i included an example of something biotic, but not living, such as paper. i used compare-and-contrast vocabulary.

i think the answer is

mass

answer; i believe the correct answer is (sporophyte);

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%