What discovery led j. j. thomson to decide that atoms were not indivisible, but are actually composed of smaller parts?

a)thomson used a scanning tunneling micrograph to capture images of atoms.

b)thomson used a beam of negatively charged particles. 

c)thomson used only the experimental results of other scientists. 

Which criteria should andreas use when evaluating which monitor to purchase? check all that apply1. cost of monitor2. quality of monitor 3. doctor's recommendation4. whether it meets his requirements5. advertiser's claims

By 2 weeks after fertilization the morula has implanted into the uterine lining and transforms into a(n) . this time is when the , or the organ that will provide nourishment to the fetus by exchanging nutrients and waste products, begins to develop.

Which biofeedback measurement is correct? ekg assesses electrical activity conducted by our muscles an emg is a test that assesses electrical activity conducted by the heart an eeg is a test that assesses electrical activity conducted by the adrenal glands a gsr is a test that assesses electrical activity conducted by the skin