TLS Online TPP Program

#Question id: 1981


Which of the following is accounted for by immunological memory?

#Unit 4. Cell Communication and Cell Signaling
  1. the human bodyʹs ability to distinguish self from nonself

  2. the observation that some strains of the pathogen that causes dengue fever cause worse disease than others

  3. the ability of a helper T cell to signal B cells via cytokines

  4. the ancient observation that someone who had recovered from the plague could safely care for those newly diseased

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TLS Online TPP Program

#Question id: 9605

#Unit 9. Evolution & Diversity of Life Forms

A phylogenetic tree that is ʺrootedʺ is one

TLS Online TPP Program

#Question id: 9606

#Unit 9. Evolution & Diversity of Life Forms

The correct sequence, from the most to the least comprehensive, of the taxonomic levels listed here is

TLS Online TPP Program

#Question id: 9607

#Unit 9. Evolution & Diversity of Life Forms

The common housefly belongs to all of the following taxa. Assuming you had access to textbooks or other scientific literature, knowing which of the following should provide you with the most specific information about the common housefly?

TLS Online TPP Program

#Question id: 9608

#Unit 9. Evolution & Diversity of Life Forms

Darwin analogized the effects of evolution as the above-ground portion of a many-branched tree, with extant species being the tips of the twigs. The common ancestor of two species is most analogous to which anatomical tree part?

TLS Online TPP Program

#Question id: 9609

#Unit 9. Evolution & Diversity of Life Forms

Dozens of potato varieties exist, differing from each other in potato-tuber size, skin color, flesh color, and shape. One might construct a classification of potatoes based on these morphological traits. Which of these criticisms of such a classification scheme is most likely to come from an adherent of the phylocode method of classification?

TLS Online TPP Program

#Question id: 9610

#Unit 9. Evolution & Diversity of Life Forms

The term ʺhomoplasyʺ is most applicable to which of these features?