Bacteria can exchange DNA between strains of the same species and between different species.
Answer the following statement true (T) or false (F)
True
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If real-time polymerase chain reaction (PCR) is performed on a Bordetella isolate, then it must be noted that this type of swab is unacceptable for collection because of the presence of which of the following inhibitory factors?
a. Dacron b. Cotton c. Rayon d. Calcium alginate
When growth factors bind to receptors on the cell surface, the signaling cascade will ____
a. initiate cell growth b. prevent cell division c. trigger cell death d. cause the cells to enter the G0 state e. trigger mitosis without the other stages of the cell cycle
The characteristic long and narrow “pipe-like” sporophyte that emerges from the parent gametophyte is characteristic of which type of seedless plant?
a. liverworts b. hornworts c. mosses d. ferns
In the studies by David Tilman of the University of Minnesota and John Downing of the University of
Iowa, reported in the journal Nature in 1994, they established and monitored 207 plots of Minnesota grasslands for seven years. During the study period, Minnesota's worst drought in 50 years occurred (1987-1988). The ecologists found that those plots with the greatest number of plant species lost __________ ground cover, as measured by dry weight, and recovered faster than species-poor plots. a. less b. more c. no detectable d. only deciduous e. detectable