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Which of the following statements is true about bacterial transformation? why?
a) cells can only be transformed when they are in a competent state.b) transformation may only be performed using plasmid DNA containing antibiotic-resustance genes (R factors)c) transformed cells are capable of passing their newly-acquired traits onto succeeding generationsd) transformation was first discovered in the bacterium streptococcus pneumoniae) cells must first be treated artificially in the laboratory before they are capable of undergoing transformation
Explain postpartum depression and tell how it differs from the Blues and discuss How common is "Postpartum Blues," and how long does it usually last?
Identify which is template for DNA, for mRNA, and which is non-template for DNA strand, and please explain how you got your answer.
Assume you have 2 tubes containing cultures of genetically distinct bacterial strains. You know that when you mix the two together, you get Horizontal gene transfer.
The method of replicated sister-group comparison of species richness has been used to implicate certain adaptive characteristics as contributors to higher species richness.
You use phase contrast microscopy to observe a wet mount of a soil sample and a goo sample. In what ways are the potential ET microbes similar to microbes previously characterized on earth?
On an autosome, genes A and B are twenty map units apart. An AABB male mates with an aabb female. What % of the gametes produced by their hybrid offspring will be Ab?
A major evolutionary trend among plants is: A reduction in size of the gametophyte and an increase in size of the sporophyte. A reduction in size of the sporophyte and an increase in size of gametophyte.
Eukaryotic cells may divide through mitosis or meiosis. How do the meiosis and sexual reproduction (fertilization) generate the offspring which differ genetically from the parents?
A population of collared lizards is fragmented into 3-glade populations through an aggressive anti-forest-fire campaign. At the "B" locus, there are only two alleles
Critically illustrate out the cause, source and extent of diarrhetic shellfish poisoning, including an opinion on its occurrence and management in Canada and the USA.
Hurler syndrome is an autosomal recessive disease caused by a deficiency of the enzyme alpha-L-iduronidase. Affected individuals are mentally retarded.
Assume your lab partner leaves in the middle of making a 50mM NaCl solution. You know that they transferred 6mls of a 250mM stock solution into a beaker,
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