Which structure is used to help regulate buoyancy of fish?
a. kidney
b. stomach
c. intestine
d. swim bladder
e. ureter
D
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All of the following photosynthetic pigments are found in red algae except:
a. chlorophyll a. b. phycoerythrin. c. fucoxanthin. d. phycocyanin. e. chlorophyll d
Which statement about the geologic time scale
is incorrect? a. Mammals originated early in the Mesozoic era. b. Adaptive radiation of flowering plants, insects, and birds took place during the Mesozoic era. c. Mass extinction of the dinosaurs occurred about 65 million years ago. d. Reptiles originated during the Paleozoic era. e. Eukaryotes originated during the Proterozoic eon.
Four of the five answers listed below are types of
intercellular connections. Select the exception. a. tight junctions b. gap junctions c. plasmodesmata d. adhering junctions e. plasmalemma
The specimen preparation that is best for viewing cell motility is
A. fixed-stained smear. B. hanging drop. C. flagellar stain. D. Gram stain. E. negative stain.