a student made a model of a cell using gelatin in a clear plastic bag and rubber ball what are the limitations

the darker peppered moth species were favored due to the fact that the industrial revolution had made all the nearby trees a darker color instead of white.

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )

i think the answer is a.keratin is the pigment responsible for skin color.