Which best explains why scientists' knowledge of atomic structure has changed several times since the discovery of the atom?
A. Scientists having different opinions on its structure
B. New technology showing the structure of the atom
C. Scientists wanting a simple model
D. New elements being discovered

Make a claim about the factors that cause inherited genetic variations within populations. also make a claim about the effects of mutations.

High blood pressure occurs when there is too much blood flowing through the blood vessels at one time. by changing the amount of water in the blood, blood pressure can change. the excretory system can to lower blood pressure.which would most likely occur in the kidney? a)more water would be transferred from the nephron.b)less water would be absorbed into the nephron.c)the amount of water in the bladder would decrease.d)the amount of water in the blood would increase.

Which nutritional supplement is correctly paired with the health issue it addresses? which nutritional supplement is correctly paired with the health issue it addresses? vitamin c supplementation prevent depression. calcium supplementation increases iq. vitamin e supplementation prevent birth defects. vitamin b12 can vegans maintain health?