A woman of blood type A marries a man with blood type O. The woman's mother had blood type B and her father had blood type AB. The man's mother had blood type B and his father had blood type A. What is the genotype of the woman's mother?
a) AO
b) BO
c) AA
d) BB
e) AB
f) O

Why is excretion necessary to maintain homeostasis?

The specific heat of ice is 0.5 calories/gram°c. 20 grams of ice will require ll calories to raise the temperature 1°c. 05

Which of the following is an advantage of using embryonic stem cells in medical research? a. the use of embryonic stem cells is much less expensive than the use of adult stem cells. o b. no living tissue is damaged when scientists use embryonic stem cells. o c. embryonic stem cells are able to differentiate into a wider range of cells than adult stem cells. d. there is no controversy surrounding the use of embryonic stem cells.