Which of the following statements regarding thermodynamics is false?
A) Thermodynamics is the study of energy transformations that occur in a collection of matter.
B) A single cell or the planet Earth could be a thermodynamic system.
C) An open system exchanges both energy and matter with its surroundings.
D) An automobile engine is a closed system because it does not exchange energy and matter with its surroundings.
Answer: D
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Mumps is a good candidate for elimination from the population due to
A. the existence of an effective vaccine. B. a human-only reservoir. C. the absence of a latent state. D. a single serotype. E. All of the choices are correct.
To perform the coagulase test on a strain of bacteria that is believed to be S. aureus, the first step is to inoculate a tube of ________ with the strain of interest.
A. nutrient broth B. mannitol salt medium C. blood plasma D. blood
Exceptionally large babies increase a mother's mortality risk when giving birth and exceptionally small babies tend to die at birth or shortly afterward. For these reasons, birthweight in human babies is generally:
a) not a heritable trait. b) subject to disruptive selection. c) subject to stabilizing selection. d) under even stronger selection today than it was before the development of Caeserian delivery. e) All of the above.
Which of the following is an example of a negative feedback mechanism in regards to hormone regulation?
A. A baby suckles in order to stimulate milk production. B. ADH is released from the pituitary causing water to be reabsorbed in the kidneys. C. The uterine contractions during labor stimulate oxytocin production. D. All of these are examples of a negative feedback mechanism. E. None of these are examples of a negative feedback mechanism.