Evidence of a chemical change can be observed when- A. a solid melts into a liquid.
B. cookies are crumbled.
C. a drink is poured from a can to a cup.
D. a banana turns brown after being cut.

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is

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

Which factor that affects biodiversity?