Which class of mollusks contains the majority of species in phylum Mollusca?
a. Bivalvia
b. Cephalophoda
c. Gastropoda
d. Polyplacophora
c. Gastropoda
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The Gram-negative chlamydiae are ________.
A. motile due to periplasmic flagella B. Gram-positive, spore-forming rods C. photosynthetic D. obligate intracellular parasites
A scout troop sets out on a backpacking trip. Soon, an unexpected storm gets them drenched, and the troop leaders discover that few boys have packed warm clothes. Several scouts start shivering uncontrollably, a sign of hypothermia. The leaders call off the trip and the group heads back to their cars. This shivering response was
A. an attempt to produce heat by burning large amounts of ATP. B. a maladaptive response that wastes energy. C. an attempt to produce heat by creating friction with their clothing. D. a social signal that evolved to alert adults to take action. Shivering is used by mammals to increase body heat when the hypothalamus detects a body temperature below the set point. Although the behavior involves muscles, the outcome is not movement but "wasted" energy in the form of heat. This is an example of nature reusing a body structure for an additional purpose.
The stomach
a. is a non-elastic sac. b. secretes enzymes that begin to break down fats. c. secretes enzymes that begin to break down proteins. d. is surrounded by three layers of skeletal muscle. e. fits all of these descriptions
MT from case above is also taking Maalox and Dexilant. Which of the following can decrease the levels of levothyroxine?
a) Maalox b) Dexilant