Which of the following is considered to be a differential staining procedure?

A. Acid-fast stain
B. Gram stain
C. Both Gram stain and Acid-fast stain
D. Leifson's flagella stain


Answer: C

Biology & Microbiology

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Many male songbirds have very distinctive songs that are used to attract females. These songs are an example of a ________ isolating mechanism.  

A.  postzygotic, ecological B.  prezygotic, behavioral C.  prezygotic, temporal D.  postzygotic, mechanical E.  prezygotic, gamete fusion

Biology & Microbiology

Following genetic recombination, ____

a. the bacterial cell is unable to divide b. the bacterial cell is no longer able to replicate its DNA c. the bacterial cell is a partial haploid d. any remnants of DNA that did not contribute to the genetic recombination form plasmids e. all progeny of the recombinant cell contain the new gene combination

Biology & Microbiology

What might a sea turtle or seabird mistake a plastic bag for which makes plastic bags extremely dangerous?

a. Fish b. Jellyfish c. Seal d. Kelp

Biology & Microbiology

The classification system includes the domain Archaea. What characteristic would NOT be found in an organism in this domain?

A) a cell membrane B) a set of genetic instructions C) a nucleus D) a cell wall

Biology & Microbiology