Question

HELP MEES!!
Another name for unicellular organisms that dominated Earth up to the Precambrian time is
A. eukaryotes.
B. cyanobacteria.
C. stromatolites.
D. prokaryotes.

Answer 1

@Destinymasha @dacutiepie

Answer 2

stromatolites

Answer 3

i beliave its c

Answer 4

i think C

Answer 5

thank yous can you help me

Answer 6

yup

Answer 7

with another question?

Answer 8

yes

Answer 9

shoot!

Answer 10

The greenhouse effect is related to the phenomenon of an increase in average surface temperature known as
A. air pollution.
B. agricultural improvement.
C. global warming.
D. conservation.

Answer 11

C

Answer 12

im stuck between A and C

Answer 13

but i think c....

Answer 14

thank yall

Answer 15

Which colorless and odorless gas, produced by radioactive decay of Uranium-238, is considered to be a cancer-causing agent?
A. Oxygen
B. Hydrogen
C. Boron
D. Radon

Answer 16

i think radon

Answer 17

thank you

Answer 18

Scientists can determine if oxygen existed in Earth's Archean atmosphere by
A. determining how many people survived.
B. looking for oxidized iron in rocks.
C. looking at the amount of salt content in rocks.
D. determining the lack of oxidation that occurred.

Answer 19

last one for now

Answer 20

hm....im not sure about this one - maybe B?

Answer 21

thank yous for all of the help

Answer 22

wlcm

Answer 23

i only missed 2 can you help me with those..