During which step of mitosis do the chromatids line up in the middle of the cell? a. prophase b. telophase c. anaphase d. metaphase

Anne, an intern in a microbiology lab, was observing the characteristics of various specimens of protists. match each specimen to the category of protist to which it belongs.

What is a group of organisms that are closely related and share similar characteristics

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