Viruses may only be grown
A. in sterile, cell-free chemical growth media.
B. in living cells.
C. at body temperature.
D. in darkness.
B
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Internal and external fertilization both _____
A) produce single-celled zygotes B) occur only among invertebrates C) occur only among terrestrial animals D) depend on the use of copulatory organs E) occur only among birds
Cytokines released by white blood cells that activate T cells and B cells, provoke an inflammatory response, and induce fever are called
A. histamines. B. complement proteins. C. interleukins. D. interferons. E. epinephrines.
The force necessary to cause microtubules of cilia and flagella to slide alongside one another is provided through the
action of ____ proteins, which derive the energy to perform their work directly from ____ molecules. a. kinesin; ADP b. kinesin; glucose c. tubulin; ATP d. dynein; ATP e. dynein; ADP
How does meiotic cell division produce genetically variable, haploid cells?
What will be an ideal response?