Why might a blood cell have a different shape than a muscle? ?
a. cell shapes are related to their function.
b. specialized cells often have a special shape
c. they have the same shape
d. both a and b

Paleontologists have found plant fossils deep within the layers of the north polar region. these leaf fossils have been labeled as to the rock layers they were found in, with the lower numbers being layers close to the earth's surface and higher numbers representing deeper layers. according to the numbers of these four leaf fossils, what might you infer?