What does an ECG record?
A. blood volume
B. brain activity
C. hormonal changes
D. heart sounds
E. electrical changes
Answer: E
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Variation arises in asexually reproducing populations by ________
a. mutation b. all of the choices c. natural selection d. recombination
During an autoimmune response, the body's immune cells may attack ________. a. the cells in the pancreas b. All of these choices
c. the cells in the thyroid d. the cells in the skin e. the neuromuscular junction
What type of mutation occurs due to exposure to damaging environmental agents?
a. transition substitutions b. spontaneous mutations c. induced mutations d. transverse substitutions
Development and reproduction of an organism is guided by instructions from
a. the blood. b. the brain. c. DNA. d. the environment. e. RNA.