Which division of time on the geologic time scale is the longest? A. An eon
B. A period
C. An epoch
D. an era

Factors that can increase mutation rates a. high temps b. low temps c. food additives d. uv rays

Guinea pig coat color is determined by a single gene. the allele for black coat color is dominant to brown. in a cross between twoblack-haired guinea pigs, 20 offspring are born. if both parents were heterozygous, probability would predict that approximately howmany of the 20 offspring would have brown hair?

According to the cell theory, which describes cells? a. all organisms are composed of multiple cells. b. all cells have the same structure and function. c. cells are found in everything on earth. d. living organisms are not created spontaneously