The doppler effect suggests that sound waves are relative to the observer. you know if an object is coming or going from the sound it makes. light waves follow the doppler effect also. however, instead of sound changing, you know if an object is coming or going

from the color of the light.

Explanation:

1) Indeed, the Doppler effect states the the frequency of the light is perceived differently whether the source of light is approaching or it is moving away.

2) If the source of light is moving away, the observer will perceive a longer wave length, which is a lower frequency.

Since the lowest frequency of vsible light is red, it is said that the light is red shifted.

If the source of light is approaching, the observer will perceive a shorter wave length, which is a higher frequency.

In this case is is said that the light is blue shifted.

cell differentiation  is how generic embryonic  cells  become specialized  cells. this occurs  through a process called gene expression. gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a  cell  functions.

explanation:

"i have always loved contemporary art and made it a general goal to work within the field. after a few nonprofit internships at museums and galleries, i decided to try the for-profit art world and was offered a job as the ad assistant at the magazine. i much prefer the pace of the for-profit art community and have stayed with the company for three years, with a promotion to an account manager last spring."

i just did this and got a 100.