stussyamanda stussyamanda

02-11-2017
Biology

contestada

which were the earliest oxygen-producing life-forms?
a.cyanobacteria.
b.seaweed.
c.dinosaurs.
d.ferns.

Respuesta :

Аноним Аноним

02-11-2017

A. cyanobacteria is the answer!

Answer Link

allyssaquigley allyssaquigley

02-11-2017

A is the answer Cyanobacteria I hope this helps

Answer Link

Otras preguntas

Which compound has both ionic and covalent bonds? (1) CO2 (3) NaI (2) CH3OH (4) Na2CO3

what kind of government did the citizens of Athens, Greece, live under

23. Although they are radially symmetrical, echinoderms are more closely related to a human than to a jellyfish because they are ________. (1 point)

Carmen rolls a cube with sides labeled A, B, C, D, E, and F. What is the number of possible outcomes?

What was the precursor to the Baby Boom?

How were the actions taken by Presidents Ford and Carter to address the country’s economic downturn similar? How did they differ?

what would happen to an enzyme if the temperature and ph changed significantly beyond the enzymes optimum level

4n^2 -15n+9 factor completely

1. Improved income and mobility resulted in Choose one answer. a. reforms of consumer law. b. great strains on America's highway system. c. the development

When Germany began World War II in 1939, a secret agreement with the U.S.S.R. allowed Soviet troops to __________. A) occupy eastern Poland B) annex eastern Cze