To which group of fishes does the following description apply: swim bladder, bony skeleton, and paired fins supported by bony rays.
A. Chondrichthyes
B. Sarcopterygi
C. Actinopterygi
D. Placodermi
E. Acanthodii
Answer: C
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a. food-borne listeriosis. b. staphylococcal food poisoning. c. gastric gangrene. d. Salmonella infection.
In marine turtles, excess salts are removed by:
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The respiratory center is very sensitive to changes in ________ levels, but not very sensitive to changes in ________ levels
A) blood sugar; hormone B) carbon dioxide; oxygen C) oxygen; carbon dioxide D) hormone; blood sugar E) temperature; blood pressure
A small wooded area was cleared for a new building, but then the builders went bankrupt. Over the ensuing years, plants and animals moved back into the plot in a process called ________
A) biological magnification B) secondary succession C) primary succession D) climax community