Login or Sign Up
Menu
Ask a New Question

cyanobacteria,wich first appeared on earth over 3 billion yaers ago are?

a.austrolopithecines
b.prokaryotes
c.one of the organisms on land
d.descendents of primitive plants

http://en.wikipedia.org/wiki/Cyanobacteria
Read 1st Paragraph

Cyanobacteria, which first appeared on Earth over 3 billion years ago, are b. prokaryotes. According to the first paragraph of the provided Wikipedia link, cyanobacteria are a group of photosynthetic bacteria and are classified as prokaryotes, which means they do not have a membrane-bound nucleus.

Cyanobacteria, also known as blue-green algae, are prokaryotes. To find this answer, you can visit the Wikipedia page on cyanobacteria and read the first paragraph.