What increases the efficiency of gills extracting dissolved oxygen from the water?
A) the operculum
B) blood vessels forcing blood into water
C) countercurrent
D) the pelvic fin flapping violently
Ans: C) countercurrent
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Which of the following groups would be most likely to exhibit uniform dispersion?
A) red squirrels, who actively defend territories B) cattails, which grow primarily at edges of lakes and streams C) dwarf mistletoes, which parasitize particular species of forest tree D) moths, in a city at night E) lake trout, which seek out cold, deep water high in dissolved oxygen
Epithelium is indicated by
a. A. b. B. c. C. d. D. e. E.
The genomes of most plant viruses consist of single stranded DNA
____________________ Indicate whether the statement is true or false.
The selective chemicals in the CNA blood agar are
A. Colistin & Nalidixic Acid B. Chloramphenicol & Nitrofurazone C. Colistin & Nitrofurazone D. Cloxacillin & Nalidixic Acid E. Chloramphenicol & Nalidixic Acid