Answer:
F-: StrR, his+ and met+
Explanation:
the strain Hfr is a high-frequency strain of recombination that includes the F plasmid (fertility factor). Therefore, the whole genome sequence is able to be passed via Hfr to its receiver, but it needs a long duration of physical contact with the recipient because the recipient gets a gene (long time physical contact is seldom attained) and retains the F strain. Also, genomes from the F-cells are not passed backwards to the HF cells. Therefore, only F strain with tolerance to Streptomycin and capable of synthesizing its amino acids on limited media can thrive in this situation. Which is F-: StrR, his+ and met+ recombining.
Your nose and your mouth are both a portal of entry into your body. If you cover one and not the other it defeats the purpose because Bacteria can still enter the system. They are both part of your respiratory system.
The effective rate of reproduction of an asexual lineage is 12 per year, what would be the effective rate of reproduction of a lineage are 3.
Although the primary replica quantity, R zero, is beneficial for information the transmissibility of a ailment and designing diverse intervention strategies, the conventional threshold amount theoretically assumes that the epidemic first takes place in a totally inclined population, and hence, R zero is basically a mathematically described amount. In many instances, it's miles of realistic significance to assess time-structured versions withinside the transmission capability of infectious diseases.
R(t) indicates time-structured version because of the decline in inclined individuals (intrinsic factors) and the implementation of manipulate measures (extrinsic factors). If R(t)<1, it indicates that the epidemic is in decline and can be seemed as being beneathneath manipulate at time t (vice versa, if R(t)>1). T
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