RodBrieger520 RodBrieger520

03-04-2014
Biology

Answered

During the evolution of life on Earth, the photosynthetic organisms initially responsible for raising atmospheric oxygen concentrations from less than 1 percent to about 20 percent were
(A) cyanobacteria
(B) archaea
(C) diatoms
(D) flowering plants
(E) mosses

Answer :

chaospaulo chaospaulo

03-04-2014

B or A the chapter I learned talked about both

Answer Link

Other Questions

plzzzzzz helppp meee tomorrow is my testttt 1 explain why bacteria are classified as living cells but viruses are not 2 name two main groups of bacteria 3 descr

find the unit rate kenny reads 58 pages in 23 minutes

which rain forest is located mostly on islands

The arrangement of atoms in a water molecule HO is best described as A ring B trigonal planar C linear D trigonal pyramidal E bent

Explain why the high pitched whistle is fine for the Dolphins

why did the citizens of Richmond Virginia feel upset about the actions at Fort Sumter

After World War II the legal basis for the criminal trials of German and Japanese wartime officials by the Allies was that these officials had 1 overthrown mona

write the equation to find the number of gallons in 60 pounds of fuelyou are in a pit crew for a driver at a Nascar race the gas weighs 592 pound per gallon You

the cost of lunch 2940 and Maya paid 3381 in all what percent was the tip that maya left

How did the cottage industry end