Atree of life depicting the hypothetical phylogeny of the three domains is shown above. at which letter is located the common ancestor that would contain membrane-bound organelles?
a) a
b) b
c) c
d) d

Explain the physiological changes that occur when the hypothalamus stimulates the sympathetic nervous system. you can make a flowchart or a simple step process. be sure to include all chemicals/hormones secreted, glands involved and the functions of each chemical/hormone.