Do these two sentences from wikipedia have the same meaning?
Whereas '' S '' represents the phylogenetic states , '' D '' corresponds to the observed data and Formula 7 represents both the evolutionary model and the family tree .
Whereas '' S '' represents the ancestral states , '' D '' corresponds to the observed data and Formula 7 represents both the evolutionary model and the phylogenetic tree .

Available options:
(a). no;
(b). yes;
The answer is:
(a).