<span>A. Correct – silent <em>mutations change</em> the <em>genetic</em> code of the DNA, but do not result in <em>changes</em> to the protein function. Therefore, the phenotype of the organism is not affected. A <em>mutation occurs at the midpoint of a gene</em>, <em>altering all amino acids encoded after the point of mutation</em>.
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1. The group nearest the end or with the shortest stem of a phylogenetic tree has evolved most recently. In this case it is eutherians.
2. The group with the longest stem has been around the longest: fish
3. A direct common ancestor will share the same immediate line, like marsupials and eutherians. Fish and marsupials do not have a common direct ancestor.
You make an educated guess in what you already know about the experiment.
Make sure you hypothesis is testable, It is not a question so dont make it sound like one <span />
Assuming this is true or false, the answer is false.
