1.
Figure 26.1
On the figure in your textbook (page 502), draw a box around the names of viruses for which you have been vaccinated. Circle viruses that have sustained infections in your body.
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2.
Figure 26.2
In this sample, viruses outnumber bacteria and archaea by about what factor?
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3.
Figure 26.4
Many of the viruses that infect bacteria are capable of lysogeny. If a particular host-cell population is growing and dividing rapidly, the viruses that infect the cells will tend to stay in the lysogenous state. If the cells begin to starve and stop dividing, however, the viruses tend to switch to lytic growth. From the virus's point of view, why is this switch advantageous?
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4.
Figure 26.5
On the figure in your textbook (page 507), draw lines connecting the structures visible in parts (a) and (b). According to this micrograph, did the artist represent the structure accurately?
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5.
Figure 26.12
Budding viruses don't always kill their host cell; bursting viruses always do. Why?
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