A germline mutation occurs in cells that give rise to
A. nonsex cells.
B. skin cells.
C. diploid cells.
D. liver cells.
E. gametes.
E. gametes.
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The portion of a mushroom that you typically eat is
a. the fruiting body. b. the reproductive structure. c. the chytrid sac. d. both the fruiting body and the reproductive structure.
A researcher planned to duplicate the Luria Delbruck fluctuation experiment. This researcher inoculated twenty samples of liquid nutrient media with bacteria from the same colony and let them grow overnight. The next morning the researcher noticed that all but one of the flasks had come open and were ruined. Not wishing to redo the experiment, the researcher spread samples of bacteria from the one intact liquid culture on twenty petri plates that had nutrient agar infused with bacteriophage. What results do you expect the researcher obtained from this experiment?
A) All plates had some bacterial colonies; some plates had more bacterial colonies than others. B) Some plates had no bacterial colonies; others had varied numbers of colonies. C) All plates had a similar number of bacterial colonies. D) Some plates had no bacterial colonies; all of the other plates had a similar number of bacterial colonies. E) No bacterial colonies formed on any of the plates.
Habitats: Oral Microbiota
What will be an ideal response?
If a parent cell has 16 chromosomes, how many sister chromatids will be present after duplication of the chromosomes?
A) 16 B) 64 C) 4 D) 8 E) 32