Why was the genetic information from the distantly related cormorant unusable for this research? why was it important for genetic comparison to find a closely related cormorant species?

species that are closely related will have more similarities in their genetic code than species that are distantly related. the close relationship can evolutionary scientists pick out the specific changes that occurred in the genetic code to give these birds flightless wings.

Species which are distantly related have fewer similarities in the genetic information present in them. Species that are closely related will have more similar genetic codes producing many similar proteins and share many genetic similarities. Hence, in order to understand about the specific changes which caused a certain feature to appear or disappear, one must compare it with species which are closely related rather than the ones which are distantly related.

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explanation:

tsd is temerature dependent sex determination.

tsd: it is a type of environmental sex determination in which the temperature experienced during embryonic/ larval development (ambient temperature for development) determine the sex of the offspring.

crocodile displays the tsd where the ambient temperature of the developing egg determines the individual's sex. for example in the american alligator's eggs, incubation at 33 ºc produces mostly males, while incubation at 30 ºc produces mostly females. so if the american alligator's egg will get the ambient temperature (33 degree celcius)during embryonic development from egg, the offspring will be male and same for the female sex determination.