About 10,000 years ago two populations of tassel-eared squirrels were separated from each other. Today these squirrels are so different that they are unable to interbreed. Which of the following explains this phenomenon?
A. Competition
B. Extinction
C. Predation
D. Speciation

PLEASE HELP I NEED THIS ASAP

The offspring of a black cat and a white cat is a gray cat, it has the genotype bw if a black cat mates with a gray cat the chance that the offspring is white will be what percent?

In cattle a single gene with two alleles determines fur color the fur can be red white or roan roan fur has both red and white hair which of the following statements is true a the allele for roan fur color is dominant over red and white fur color b the allele for red fur color is dominant over white and roan fur color c the roan and white alleles are expressed independently of the other d the red and white alleles are expressed independently of each other

Which factor affects the force of gravity between objects? check all that apply. direction distance mass shape time