The protist Stentor contracts when it is touched for the first time but gradually stops retracting if the touching is continued. This behavior is called
A) habituation.
B) a sensitive period.
C) imprinting.
D) insight learning.
E) operant conditioning.
A
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The nephron begins in the ____
a. glomerulus b. loop of Henle c. cortex d. ureter e. medulla
In the blood clotting process, platelets arrive at the site of damage and start secreting substances to attract more platelets. More platelets arrive at the site and secrete attractants to recruit more platelets. This is an example of:
A. positive feedback. B. negative feedback. C. electrical signaling. D. feedforward regulation.
Streptomyces are aerobic soil bacteria that produce over two-thirds of our antibiotics of natural origin. These antibiotics should also be effective in killing Streptomyces.
a. true b. false
Burkitt lymphoma is a B-cell malignancy, usually of the jaw, associated with Epstein-Barr infection or coinfection with other diseases.
Answer the following statement true (T) or false (F)