How does having a diverse gene pool a species survive

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.

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?

What does the positioning of transcription factors determine?