Question

The chart below shows some events in Earth's history and the primary sources of information which were examined to date the events.


Earth event Marine animals appear fuel sources appear Mammals appear ferns appear
Primary source of information history books fossil in rocks green plants root structures

Which of these Earth events was dated using the most valid and reliable source of information?

marine animals appear
ferns appear
fuel sources appear
mammals appear

Answer 1

which one is attatched to fossil records? do you know? you need to find that out then you will have your answer

Answer 2

sooo....

Answer 3

what did ya come up with lass?

Answer 4

A

Answer 5

screenshot the chart and attach it babes.

Answer 6

or is this on paper?

Answer 7

I got that on right (:

Answer 8

nice job

Answer 9

so what are you taking? biology?