In the spring season, snakes have been observed moving onto warm roadways heated by the sunlight. This innate behavior of moving to a warmer area is a(n) behavior.
A. taxis
B. reflex
C. learned
D. habituation
E. fixed action pattern
A. taxis
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Helicobacter pylori is a principal causative agent of
A. gastroenteritis. B. toxic shock syndrome. C. human ehrlichiosis. D. peptic ulcer disease.
Virus receptors are often not distributed uniformly over the surface of host cells, but are instead concentrated in lipid rafts.
Answer the following statement true (T) or false (F)
Incubation conditions for anaerobic cultures include:
a. 30°C to 35°C. b. incubation for 48 hours before exposing the culture to air. c. incubation for at least 3 days before dis-carding. d. aerobic incubation of the broth medium with the cap loose.
What is the correct sequence of sea urchin egg coverings, beginning at the outside and moving inward?
a. granulosa cells, zona pellucida, plasma membrane b. zona pellucida, vitelline envelope, plasma membrane c. jelly coat, vitelline envelope, plasma membrane d. plasma membrane, jelly coat, zona pellucida e. vitelline envelope, jelly coat, plasma membrane