PLZ HELP The scientific name for a polar bear is Ursus maritimus. The scientific name for an American black bear is Ursus americanus. Which of the following statements is true?

Black bears are part of the Ursus species.
Polar bears are part of the maritimus genus.
Polar bears and black bears are variations of the same species.
Polar bears and black bears are part of the same family.

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What are the proteins in connectivity tissues of your foot examples of?

Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population.b) the separated population is small, and genetic drift occurs.c) the isolated population is exposed to different selection pressures than the ancestral population.d) different mutations begin to distinguish the gene pools of the separated populations.e) gene flow between the two populations is extensive.