The ____ lineage contains the fleshy-finned fishes, with fins supported by muscles and an internal bony skeleton
a. Petromyzontoidea
b. Chondrichthyes
c. Actinopterygii
d. Myxinoidea
e. Sarcopterygii
ANSWER: e
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Which of the following is a likely target for a toll-like receptor (TLR)?
A) tumor necrosis factor B) interleukin IV C) flagellin D) insulin
Diffusion is best defined as:
A. the random motion of individual molecules with net movement from areas of higher concentration to areas of lower concentration. B. the random motion of individual molecules with net movement from areas of lower concentration to areas of higher concentration. C. the highly ordered movement of large groups of molecules from areas of higher concentration to areas of lower concentration. D. the highly ordered movement of large groups of molecules from areas of lower concentration to areas of higher concentration. E. the transition from individual molecules moving in a random manner to groups of molecules moving in a highly ordered manner.
Marine fish will (select all correct choices):
A. lose electrolytes across the skin and gills. B. gain water across the skin and gills. C. gain electrolytes across the skin and gills. D. gain electrolytes from drinking. E. lose water across the skin and gills.
Dr. Ratard was trying to determine the cause of a mysterious epidemic affecting fish in the gulf of New Mexico. His proposal that the deaths were caused by an organism called a protist is considered a(n) _________
A. theory. B. data set. C. hypothesis. D. conclusion. E. experiment.