Flexible shoulder movement is made possible by the presence of which bone? a) the clavicle
b) the skull
c) the jaw
d) the molar

Which beat describes the brain stem

How do you know that the plant cells in these two images have different jobs, or functions? a. because all plant cells serve different functions b. because they are two different colors c. because their dna are different d. because their structures are different

What material did the moon come from?