The toxin found in Amanita phalloides has deadly effects on humans because it inhibits ____
a. DNA replication
b. RNA polymerase
c. peptide bond formation
d. muscle contraction
e. active transport
B
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Instead of the typical XY pairing, some males may have an XXY chromosome configuration that may result in ________.
A. Klinefelter syndrome B. Down syndrome C. Fragile X syndrome D. Prader–Willi syndrome E. None of the above
Which of the following is true of histamine?
a. causes blood vessels to contract b. causes capillaries to lose their permeability c. causes an outward flow of fluids from the capillaries d. reduces tissue swelling e. causes cells to release interferons
Which of the following groups does not include many planktonic species?
A) kinetoplastids. B) foraminferans. C) diatoms. D) dinoflagellates. E) radiolarians.
In what biome do plants tend to be evenly spaced with large, shallow root systems? Why?
What will be an ideal response?