Stem cells that produce new blood cells are found in the ___. A. heart
B. brain
C. muscle
D. bones

Suppose you use three different scale to weigh a bag of oranges. one scale says the nag weighs 2.1 lb, and third says it weighs 2.1 lb. the actual weight of the bag of oranges is 2.153 lb. which of the following best decribes these results?

Label the offspring chromosomes a1, a2, b1, or b2. circle any mutation chromosomes.

In a certain plant, yellow leaves are dominant (y) and red leaves are recessive (y). a plant with genotype yy and a plant with yy are crossed. if they have four offspring, how many would you predict would have red leaves? a: 1b: 0c: 3d: 2