An example of territoriality is
A. barnacles attached to a boat bottom.
B. a swarm of mosquitoes hovering around a sweaty person.
C. a red-winged blackbird singing to ward off other males and attract a female to the nest in his fencerow.
D. a cloud of moths attracted to a light.
E. All of the choices are correct.
Answer: C
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The ureters drain urine into the
(a) renal pelvis. (b) cecum. (c) urinary bladder. (d) small intestine.
What is the function of the cryptochromes?
a. phototropism b. gravitropism c. circadian rhythm d. defense against herbivory
Sugars and phosphates are held together in a DNA molecule by a(n) ____________________ bond Fill in the blank(s) with the appropriate word(s)
When a B cell binds to its specific antigen, it undergoes ________ to produce antibodies to the antigen
a. reproduction b. clonal expansion c. clonal anergy d. differentiation