8. The table below shows the number of generations required to produce white butterflies through natural selection Calculate the mean, or average, number
of generations it takes to produce white butterflies.

Which element provides strength to the exoskeleton of clams and oysters

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?

Ascientific idea becomes valid when it is what?