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TLS Online TPP Program

#Question id: 3834

In his transformation experiments, what phenomenon did Griffith observe?

#Unit 3. Fundamental Processes

  1. Mixing a heat-killed pathogenic strain of bacteria with a living nonpathogenic strain can convert some of the living cells into the pathogenic form.

  2. Mixing a heat-killed nonpathogenic strain of bacteria with a living pathogenic strain makes the pathogenic strain nonpathogenic.

  3. Infecting mice with nonpathogenic strains of bacteria makes them resistant to pathogenic strains.

  4. Mice infected with a pathogenic strain of bacteria can spread the infection to other mice.

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TLS Online TPP Program

#Question id: 8707

#Unit 9. Diversity of Life Forms

Use the figure to answer the following question


The phylogenetic tree shown ________.
TLS Online TPP Program

#Question id: 8708

#Unit 9. Diversity of Life Forms

Concerning growth in genome size over evolutionary time, which of these is least associated with the others?
TLS Online TPP Program

#Question id: 8709

#Unit 9. Diversity of Life Forms

Eukaryotes that are not closely related and that do not share many anatomical similarities can still be placed together on the same phylogenetic tree by comparing their ________.
TLS Online TPP Program

#Question id: 8710

#Unit 9. Diversity of Life Forms

A phylogenetic tree constructed using sequence differences in mitochondrial DNA would be most valid for discerning the evolutionary relatedness of ________.
TLS Online TPP Program

#Question id: 8712

#Unit 9. Diversity of Life Forms

The lakes of northern Minnesota are home to many similar species of damselflies of the genus Enallagma. These species have apparently undergone speciation from ancestral stock since the last glacial retreat about 10 thousand years ago. Sequencing which of the following would probably be most useful in sorting out evolutionary relationships among these closely related species?
TLS Online TPP Program

#Question id: 8713

#Unit 9. Diversity of Life Forms

Which statement represents the best explanation for the observation that the nuclear DNA of wolves and domestic dogs has a very high degree of sequence homology? Dogs and wolves ________.