What geological evidence could there be for the presence of an early ocean? Select one:

a.
Marine sedimentary rocks can be dated back about 4 billion years.

b.
The iron contained in the rocks combined with the oxygen to form reddish iron oxides.

c.
Oxygen is needed to make ozone, a molecule made of three oxygen ions, O3.

d.
No animals would have been able to breathe in Earth's early atmosphere.

In pea plants, the allele for inflated pod seed, i, is dominant over the allele for constricted pod seed, i. the punnett square shows a cross for this trait. which offspring will be homozygous dominant

Sarah and john are having a discussion on genetic diversity. sarah believes that it happen over a long period of time. john it happens immediately. who is correct? a. sarah is correct because genetic diversity occurs over a long period of time. b. john is correct because genetic diversity occurs immediately. c. both are correct because genetic variation can occur or long period of time. d. neither are correct because genetic diversity occurs over any period of time

Which ocean is on the eastern coast of north and south america? arctic ocean indian ocean pacific ocean atlantic ocean