Geographical barriers, such as large bodies of water and mountains, can result in a founder effect

Indicate whether the statement is true or false


TRUE

Biology & Microbiology

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Penetration requires that the entire virus is inserted within the host

Indicate whether the statement is true or false.

Biology & Microbiology

In E. coli cells when lactose is absent from the environment,

A. large amounts of b-galactosidase, lactose permease, and galactosidetransacetylase are made. B. trace amounts of b-galactosidase, lactose permease, and galactosidetransacetylase are made. C. no b-galactosidase, lactose permease, andgalactosidetransacetylas are made. D. the lac operon is induced. E. polycistronic mRNA levels would be very high.

Biology & Microbiology

People having heart attacks often perceive referred pain coming from the ________

a. small of back b. left shoulder and arm c. right shoulder and arm d. stomach

Biology & Microbiology

Cells viewed in darkfield microscopy appear similar to those stained with the negative stain

Indicate whether the statement is true or false

Biology & Microbiology