Answer:
pancreas
Explanation:
beta cells of the pancreas produce insulin
Answer:
Hypothesis
Explanation:
To make a hypothesis is to make an educated guess.
Answer:
Stars are classified by their spectra (the elements that they absorb) and their temperature. There are seven main types of stars. In order of decreasing temperature, O, B, A, F, G, K, and M.
Explanation:
O and B stars are uncommon but very bright. M stars are more common but dim.
