How are species-area relationships traditionally plotted?
A. on a log-log plot.
B. on a bar graph.
C. based on a source pool.
D. using a Shannon diversity index.
E. None of these choices are correct.
A. on a log-log plot.
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A number of major disease-causing protists are members of ____
a. Euglenoids b. Excavates c. Archaeplastida d. diatoms e. brown algae
Cell differentiation of a pre-embryo begins
A) immediately upon the first division of the fertilized egg. B) after the 32-cell stage. C) after the 4-cell stage. D) after the 8-cell stage. E) after the 2-cell stage.
Infectious dose of 50% (ID50) refers to the number of microorganisms required _________
Fill in the blank(s) with the appropriate word(s).
Public health scientists discover and become concerned about a new strain of RNA virus among farm animals, especially geese and pigs, in the Midwest. Each virion is composed of lipid, helical proteins, and multiple pieces of RNA. This new virus may be a(n)
A. rotavirus. B. influenza virus. C. hantavirus. D. dengue virus. E. coronavirus.