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?

1Polar bears are part of the
maritimus genus.

2Black bears are part of the Ursus species.

3Polar bears and black bears are part of the same family.

4Polar bears and black bears are variations of the same species.

There are few cells in the body that do not undergo mitosis: most somatic cells divide regularly, some more than others. take for example the cells that line the digestive tract. these cells must be frequently replaced because they are constantly eroded by the movement of food through the tract. what mechanism(s) is/are in place to ensure that these cells are exact copies of the mother cell