Particular mutations in the cystic fibrosis transmembrane conductance (CFTR) gene result in a CFTR

molecule that transports sodium ions poorly or not at all.



Indicate whether the statement is true or false.


ANS: F, chloride

Biology & Microbiology

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The common garter snake is a predator of the rough-skinned newt. These newts produce a

potent neurotoxin that is concentrated in their skin, but garter snakes have evolved resistance to this toxin.

This is an example of __________.

a. natural selection b. sexual selection c. coevolution d. natural selection and coevolution

Biology & Microbiology

Which type of arboviral encephalitis was introduced to the United States in 1999 and is maintained in a bird-mosquito-bird cycle?

a) Eastern equine encephalitis b) Japanese encephalitis c) West Nile virus d) California encephalitis

Biology & Microbiology

The lag phase does NOT occur if all the cells in the culture are viable

Indicate whether the statement is true or false.

Biology & Microbiology

The ____ of a human population is the average number of children born to a woman during her reproductive years

a. global reproductive rate b. mean reproductive rate

c. average fertility rate d. total fertility rate e. replacement fertility rate

Biology & Microbiology