Where do scientists obtain adult stem cells?

a. pancreas

b. skin

c. saliva

d. bone marrow

Pixels are often referred to using dpi, or dots per inch. true\false

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?

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above