Heather and Haley are modeling the movement of a wave using a rope. When Heather gives one end of the rope a quick up and down shake, a wave travels down the rope toward Haley. Look at the picture of the rope model shown below.

Which arrow in the picture shows the amplitude of the wave?
A.
W
B.
X
C.
Y
D.
Z

the farther away the object is from the central star (the sun) it's gravitainal pull on the object is weaker when it is farther

explanation:

blue

light-years

magnitude

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.