As temperatures increase during seasonal fluctuations in marine environments,
A) both species richness and species dominance increase.
B) species richness increases and species dominance decreases.
C) species richness decreases and species dominance increases.
D) both species richness and species dominance decrease.
C
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Which of the following genera fix nitrogen nonsymbiotically?
A. Nitrosomonas B. Nitrobacter C. Rhizobium D. Azotobacter
To increase the sensitivity of direct Gram-stain examination of body fluid specimens, the specimens are usually:
a. incubated for 18 to 24 hours before stain-ing. b. centrifuged before staining. c. examined for at least 1 hour. d. stained for an additional 5 minutes.
If van der Waals forces are weak, how can geckos utilize these forces to cling to and walk up vertical smooth
surfaces?
What will be an ideal response?The arrangement of photosystems I and II in the thylakoid membrane is exactly like drawn in the Zpathway
of most textbooks.
Indicate whether the statement is true or false.