An amino acid contains a structural "backbone" chain of
A. nitrogens.
B. phosphorus atoms.
C. carbons.
D. carbon and phosphorus atoms.
E. nitrogens and carbons.
E. nitrogens and carbons
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Human cancer causing viruses most often have a ________ genome.
A. ssDNA B. dsRNA C. ssRNA D. dsDNA
Which of the following statements about the life cycle of a crab is true? a. Most species of crab are hermaphrodites
b. A female crab hides fertilized eggs under a rock in a sheltered spot and guards them until they hatch. c. A crab larva will molt as it grows. d. Young crabs look like miniature adults as soon as they hatch from their eggs.
In which demographic model is population growth the fastest?
a. preindustrial b. transitional c. industrial d. postindustrial e. agricultural
In the accompanying figure, the structure labeled “H” is a ____
a. muscle fiber b. sarcoplasmic reticulum c. mitochondria d. myofibril e. Z line