The second edition of Bergey's Manual classifies bacteria ________.
A. phonetically
B. phylogenetically
C. numerically
D. None of the choices are correct.
Answer: B
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During the development of the vulva in Caenorhabditis, when EGF binds an EGF receptor on a progenitor cell:
A. signal transduction results in activation of a set of transcription factors. B. genes that produce the Notch ligand are transcribed. C. genes that produce the Notch receptor are inhibited. D. genes that produce the EGF receptor in the adjacent cells are inhibited. E. All of these choices are correct.
The synthesis of the daughter strand of DNA occurs away from the replication fork in the leading strand
Indicate whether the statement is true or false
Pheromones are
A. chemicals. B. used to communicate. C. specific to each species. D. All of these answers are true.
Why were the first RNA replication experiments insufficient support for the RNA world hypothesis?
a. The experiments did not demonstrate natural selection. b. RNA could not adapt to environmental challenges. c. The RNA produced was not self-replicating. d. No mutations occurred in the RNA. e. Mutations occurred but they were not heritable.