The amount of heat energy needed to raise 1 gram of water from 14.5°C to 15.5°C is called a(n) ________.
A. thermal unit
B. calorie
C. joule
D. erg
Answer: B
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Bacteria cause all of the following human diseases except
A. cholera. B. diphtheria. C. tuberculosis. D. tetanus. E. malaria.
Which of the following is NOT a factor in
moving blood back to the heart?
a. systolic pressure b. smooth muscle contraction c. skeletal muscle contraction d. one-way valves in veins e. more than one of these is NOT a direct factor in moving blood back to the heart
The functional unit of the kidney is the
a. renal pelvis. b. ureter. c. cortex. d. nephron.
Griffith's experiments with S. pneumoniae were significant because they showed that traits could be transferred from one organism to another. What else did he find that was significant?
a) The transferred traits were heritable b) DNA was the genetic material c) A virus made the bacteria pathogenic d) Protein could not be the genetic material e) Heat kills bacteria