What is the function of mitosis?

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

Climate warming trends allow plant and insect species to inhabit larger ranges. select the best answer from the choices provided

Asquirrel population lives in an area. over many years, a river in that area grows wider and stronger, eventually forming a canyon. the squirrel populations on the two sides of the canyon can no longer mate with each other and ultimately form distinct species. this is an example of