A young woman who was recently hiking in the mountains and discovered a tick on her torso has a fever that came on quite suddenly. She has no rash, but she develops leukopenia. Which of the following diseases is she most likely to have contracted?
A. anaplasmosis
B. Lyme disease
C. relapsing fever
D. Rocky Mountain spotted fever
E. scrub typhus
Answer: A
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Imagine that a coyote tobacco plant is being eaten by M. sexta caterpillars. In response to these specific herbivores, the tobacco produces volatile chemicals that can travel through the air. Why?
A. to signal to other tobacco plants that caterpillars are in the area B. to produce an odor that will deter other caterpillars from eating its leaves C. to attract insect predators that will eat the caterpillars D. to signal to other parts of the plant to produce more nicotine
Attributes of Welwitschia mirabilis include
_____ It has only two leaves. _____ It obtains most of its water from seasonal heavy rains. _____ It lives under desert conditions. _____ It is a gnetophyte. _____ Its stems are photosynthetic, but its leaves are not.
Predict what would occur if the amount of sodium suddenly increases in the blood.
A. Blood osmolarity would increase. B. Blood aldosterone levels would decline. C. Blood antidiuretic hormone would decline. D. Both blood osmolarity would increase and aldosterone levels would decline. E. Both blood osmolarity would increase and antidiuretic hormone levels would decline.
Why is immunity to the common cold so difficult to develop, either naturally or through vaccines?
What will be an ideal response?