2) Which of the following statements is true of plants living before the paleozoic? They share a common ancestor with bryophytes.
b) They utilized seeds to preserve their gametes(seeds),
They had vascular tissue to transport water and nutrients.
d) They could be classified as either an angiosperm or gymnosperm.

format change of dna.  

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.

more words for this could be abiotic and biotic

abiotic: living organisms within an ecosystem

biotic: non-living organisms within an ecosystem