The Precambrian time period is segmented into very few parts because: a.
the fossil record is scarce
c.
cyanobacteria were the only life form
b.
life did not exist
d.
volcanic activity ruined the fossil record

What is the best way to improve the conclusion? add a sentence to the ending that summarizes the writer’s topic. add a sentence to the middle that reflects on the writer’s experiences. revise the final sentence to have a different tone. revise the first sentence to state a future goal.

What functions as a reflexive pronoun in the sentence the professor herself wanted to attend the conference, but it was cancelled when she and several other presenters had to excuse themselves

Identifying parts of a chemical equation identify each part of this chemical equation that describes the burning of methane and oxygen. b (blue box): d (number): e (purple box):