The most complex wayfinding mechanism is ____, in which animals use both a compass and a mental map of the
area.
a. piloting
b. orienteering
c. compass orientation
d. migration
e. navigation
ANSWER: e
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Marine teleost fishes deal with the osmotic stress of living in seawater mainly by
a. active transport of ions into the body through the gills. b. excreting nitrogenous wastes through their kidneys as urea. c. active transport of ions out of the body by chloride cells. d. excreting excess salt through the actions of specialized salt glands in their heads. e. maintaining high levels of urea and trimethylamine oxide in body fluids.
When a neuron is at rest
a. there are more positively charged ions inside the axon than outside it. b. there are more negatively charged ions inside the axon than outside it. c. there are more negatively charged ions outside the axon than inside it. d. there are equal amounts of negatively charged ions outside the axon and inside it. e. there are more positively charged ions outside the axon than inside it.
Discuss the importance of serial endosymbiosis, both primary and secondary, in the protists. What will be an ideal response?
Which of the following would not be found in loose connective tissue?
a. collagen fibers b. reticular fibers c. actin proteins d. elastic fibers e. fibroblasts