TLS Online TPP Program

#Question id: 31167


Which of the following ionic changes is correctly matched with a component of the action potential?

#Unit 7. System Physiology – Animal
  1. Opening of voltage-gated K+ channels: Depolarization
  2. A decrease in extracellular Ca2+ : Repolarization
  3. Opening of voltage-gated Na+ channels: Depolarization
  4. Rapid closure of voltage-gated Na+ channels: Resting membrane potential
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TLS Online TPP Program

#Question id: 9608

#Unit 9. 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 1. Molecules and their Interaction Relevant to Biology

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: 9609

#Unit 9. 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. Diversity of Life Forms

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

TLS Online TPP Program

#Question id: 9611

#Unit 9. Diversity of Life Forms

If, someday, an archaean cell is discovered whose SSU-rRNA sequence is more similar to that of humans than the sequence of mouse SSU-rRNA is to that of humans, the best explanation for this apparent discrepancy would be

TLS Online TPP Program

#Question id: 9612

#Unit 9. Diversity of Life Forms

The best classification system is that which most closely