Biology, 31.01.2020 19:53, jessicaou2005
Amolecule that can be used as a molecular clock has a neutral mutation rate of one mutation per 10 million years. how many years ago did two species share a common ancestor if the molecules found in these two species differ by a total of six mutations?
a. 6 million years
b. 10 million years
c. 30 million years
d. 60 million years
Answers: 3
Biology, 21.06.2019 20:00, anthonyjackson12aj
Which of the following matches the organisms described with the correct domain? a. bacteria--unicellular, eukaryotic organisms with cell walls that do not contain peptidoglycanb. archaea--multicellular, eukaryotic organisms that do not have cell wallsc. eukarya--single-celled and multicellular organisms, with a defined nucleus and a variety of nutritional sourcesd. bacteria--unicellular, eukaryotic organisms that always lack cell walls
Answers: 1
Biology, 22.06.2019 04:30, weeblordd
Rachel ate a piece of fruit and happened to drop the seeds in her backyard. after a few weeks, she saw a small plant with flowers growing in the backyard. which group does this plant belong to? a. angiosperms b. gymnosperms c. pteridophytes d. bryophytes e. chytrids
Answers: 1
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