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.

The genetic code is essentially the same for all organisms. based on this information, one can logically assume which of the following statements to be correct? a. dna was the first genetic material. b. the same codons in different organisms translate into the different amino acids. c. different organisms have different numbers of different types of amino acids. d. a gene from an organism can theoretically be expressed by any other organism. e. all organisms have experienced convergent evolution.