Which best characterizes the precambrian era?

a.

abundant plants and animals

b.

dinosaurs

c.

small, one-celled organisms and primitive jellyfish

d.

extensive mountain building

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.