Pulsed-field gel electrophoresis (PFGE) is often used to determine whether bacterial isolates from different cases of food-borne illness are the same and can be traced to the same source. This is an example of

A.) an immunologic technique.

B.) a genetic method.

C.) a phenotypic method.

D.) a microscopic technique.


B.) a genetic method.

Biology & Microbiology

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Indicate the scenario(s) that could directly result in sympatric speciation. Check all that apply.  

_____  Two sunflower species cross to form a healthy hybrid individual with equal copies of chromosomes from each parental species. _____  A new river channel divides a population of beetles into two populations. _____  A large fence blocks the intermingling of two populations of a species. _____    A subset of flies within a larger population colonizes a new host plant. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required?   Gather Content · What do you already know about sympatric and allopatric speciation?   Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?   Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?

Biology & Microbiology

How many bones are in the adult human skeleton?

a. 336 b. 26 c. 201 d. 106 e. 206

Biology & Microbiology

A drop to pH 4.0 in the duodenum would primarily stimulate the release of ________________.  

A.  secretin B.  pepsin C.  cholecystokinin D.  insulin E.  gastrin Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you know about a hormone secreted in response to acid? What other information is related to the question? Choose Answer · Given what you now know, what information is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?

Biology & Microbiology

An -NH2 group is a(n) ____ group

a. carboxyl b. hydroxyl c. amine d. methyl e. carbonyl

Biology & Microbiology