What is the primary cause of the change in carbon dioxide (CO2) levels starting at point X in the graph below? * The sun became much brighter than it was before then.
Humans began to farm and settle in towns since then.
Several volcanic eruptions happened since then.
The ocean started releasing much more carbon into the atmosphere.
Humans have burned large amounts of fossil fuels since then.

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.