A particle that consists of nucleic acids surrounded by protein and requires a host organism to replicate is
A. a bacteria.
B. a viroid.
C. a plasmid.
D. a virus.
E. a prion.
D. a virus.
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Gene families are composed of homologous genes that have different evolutionary origins but the same function
Indicate whether the statement is true or false.
Pyruvate is converted to acetyl CoA by a unique enzyme known as
A) pyruvate decarboxylase. B) pyruvate dehydrogenase complex. C) transitionase system. D) multiplex enzyme system. E) pyruvate CoA transferase.
Which is not a requirement for natural selection to occur?
A) Random mating B) Competition for limited resources C) Variation in the offspring D) Unequal reproductive success
Which of the following characteristics distinguishes prokaryotic organisms from eukaryotic organisms?
A. Prokaryotes lack a cell membrane, while eukaryotes do not B. Prokaryotes are unicellular, while all eukaryotes are multicellular C. Prokaryotes are aquatic, while eukaryotes are terrestrial D. Prokaryotes require a host to replicate, while eukaryotes do not E. Prokaryotes are structurally less complex than eukaryotes are