Which of the following is NOT commonly used to describe a community?
a. species richness
b. relative abundance
c. species diversity
d. dominant species
e. trophic abundance
E
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The minimum lethal concentration (MLC) is the lowest concentration of drug from which organisms fail to recover when removed from the drug.
Answer the following statement true (T) or false (F)
Many photosynthetic prokaryotes are capable of cyclic electron transport only. It is likely that such organisms can __________ but not __________
A. produce ATP; reduce H2O B. produce ATP; reduce CO2 C. produce NADPH; reduce CO2 D. produce NADPH; oxidize H2O E. reduce CO2; synthesize carbohydrates
The elaborate courtship rituals of many bird species help to preserve their genetic isolation through
A) behavioral isolation. B) hybrid inviability. C) allopatric separation. D) temporal isolation. E) mechanical incompatibility.
The ________ is a keystone predator in the ocean
Fill in the blank(s) with correct word