If you forgot to apply the safranin counterstain while performing a Gram stain, which outcome would you expect?
A. Gram-positive bacteria would stain pink.
B. Gram-negative and Gram-positive bacteria would be unstained.
C. Gram-negative bacteria would be unstained.
D. Gram-negative bacteria would stain purple.
Answer: C
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There is a phenomenon called parental leakage, in which a small amount of the mitochondrial DNA from the father is found in the offspring
If parental leakage is assumed to have occurred throughout human history, how does it change our interpretation of Matthias Krings and Svante Päabo's studies of mitochondrial DNA in specimens of Neanderthals and modern humans? A. If the paternal mitochondrial DNA did show up in the offspring alongside maternal mitochondrial DNA, these would have immediately indicated that the two groups interbred. B. The results would have been exactly the same because researchers were looking at only female modern humans in this study. C. Mitochondrial DNA coming from the father would negate all of the advantages of using mtDNA as the source for genetic information in the first place, so the whole study would be useless. D. The results would have been exactly the same because researchers were looking at only modern humans that were males for this study. This means it wouldn't have mattered if paternal leakage occurred or not.
What is an example of a habitat?
a. predator b. intestinal tract c. parasite d. producer e. decomposer
Compare and contrast the steps of viral multiplication cycles in bacteriophages and animal viruses.
What will be an ideal response?
What is the name of the process used by the nervous system to increase the strength of muscle contraction by stimulating more motor units?
Summation Tetanus Oxygen debt Recruitment