Several squirrels move into a new area and join an existing population of squirrels, changing the genetic makeup of the population. This is an
example of... *

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.

some inherited genetic mutations can be good for the offspring, so the answer is different genetic mutations cause many forms of cancer.

answer australia and antarctica;