Which of the following best describes a positive feedback response?
A. Change in the body is the result of an internal stimulus
B. Response of the body favors the change caused by a stimulus
C. It is when a very negative person won't stop complaining to you
D. Response of the body opposes the change caused by a stimulus
E. It is when the body anticipates a change is coming and tries to prepare for it in advance
Ans: B. Response of the body favors the change caused by a stimulus
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The main DISADVANTAGE of excessive gluconeogenesis during prolonged postabsorptive periods is that
A. continued protein breakdown can impair enzymatic activity and plasma membrane functions. B. carbohydrate buildup in the liver impairs its function. C. the brain is exposed to levels of glucose that are too high. D. tissues other than the brain increase glucose utilization. E. glucose absorption from the gut is impaired.
You are confronted with a box of preserved grasshoppers of various species that are new to science and have not been described. Your assignment is to separate them into species. There is no accompanying information as to where or when they were collected. Which species concept will you have to use?
A) biological B) phylogenetic C) ecological D) morphological
Which of the following pairs is mismatched?
A) subacute bacterial endocarditis — alpha-hemolytic streptococci B) acute bacterial endocarditis — Staphylococcus aureus C) pericarditis — Streptococcus pyogenes D) puerperal sepsis — Staphylococcus aureus E) Burkitt's lymphoma — Epstein-Barr virus
A small amount of DNA is collected from a crime scene. However, the amount of DNA collected is insufficient to perform the necessary experiments to link a suspect to the crime. Which method could be utilized to increase the amount of DNA?
A. polymerase chain reaction (PCR) B. microarray analysis C. DNA sequencing D. gel electrophoresis E. fluorescent labeling of DNA