Which test is the confirming test for people who initially tested antibody-positive in the screening ELISA test?
A.) Ouchterlony double diffusion
B.) Western Blot
C.) immunelectrophoresis
D.) radioimmunoassay (RIA)
E. the Quellung test
B.) Western Blot
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An oxygen atom has ____ surrounding a nucleus composed of ____
a. neutrons; electrons and protons b. electrons; protons and neutrons c. protons and electrons; neutrons d. protons; neutrons and electrons e. electrons and neutrons; protons
You observe a sunflower that moves its leaves so that it tracks the sun across the sky through the day,
and a sensitive plant that reversibly folds up its leaflets when you touch it. These are both examples of
a. phototropism. b. thigmotropism. c. stress responses. d. circadian rhythms. e. nastic movements.
Why does it make sense that the autonomic nervous system controls mostly involuntary processes?
What will be an ideal response?
Researchers studying guppies in Trinidad found that guppies, in streams with high predation, reproduce earlier and more frequently. How would the scientists describe the selective force acting on the guppy population?
A. r-selection B. sexual selection C. density-dependent factors D. density-independent factors E. K-selection