C would be missing. because when secondary succession occurs, it was previously occupied and re-colonized. im almost positive because i kind of remember doing this a few weeks ago. hope this helps a bit!
Answer:
Horizontal gene transfer
Explanation:
Horizontal gene transfer or lateral gene transfer is when an organisms of different species can acquire a gene from a different one. This process is well understood in bacteria and is responsible for the appearence of antibiotic resistant bacteria. Bacteria can take DNA fragments through a process known as transformation, but this is less common in eukaryotes. Gene transfer agents like viruses could carry the gene from one specimen to the other. Another way could be Horizontal transposon transfer but the exact mechanisms behind it are still under research.
Answer:
<em>A. Natural Selection</em>
Explanation:
