The signal from the environment that triggers a stereotyped behavior is a
A. conditioned reflex.
B. fixed action pattern.
C. reinforcing stimulus.
D. releasing mechanism.
E. key stimulus (sign stimulus).
E. key stimulus (sign stimulus).
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Adaptive immunity is based upon _____
A) traits common to groups of pathogens B) pathogen-specific recognition C) maternal provision of antibodies to offspring D) plants being exposed to new pathogens E) having exhausted all options for innate immunity responses
Winged arthropods rely solely on behavioral mechanisms for thermoregulation
Indicate whether the statement is true or false.
Which of the following can cause pelvic inflammatory disease, characterized by fever and abdominal pain?
A) Neisseria gonorrhoeae. B) Treponema pallidum. C) Staphylococcus aureus. D) Chlamydia trachomatis E) both Chlamydia trachomatis and Neisseria gonorrhoeae
Heat is used to drive dye into cells in ________ stain(s).
A. the Gram B. the endospore C. the acid-fast D. the flagellar E. both the endospore and acid fast