TLS Online TPP Program

#Question id: 27126


Dye injected into a plant cell might be able to enter an adjacent cell through a:

#Unit 4. Cell Communication and Cell Signaling
  1. tight junction.

  2. microtubule.

  3. desmosome.
  4. plasmodesmata.
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TLS Online TPP Program

#Question id: 5320

#Unit 9. Evolution & Diversity of Life Forms

Which of the following types of genes or gene families may be created by mutations that occur in one member of a gene pair that arose from gene duplication:?

TLS Online TPP Program

#Question id: 5321

#Unit 9. Evolution & Diversity of Life Forms

Biologists now routinely test for homology between genes in different species. If genes are determined to be homologous, how are they related to each other?

TLS Online TPP Program

#Question id: 5322

#Unit 9. Evolution & Diversity of Life Forms

A current view of how the human and chimpanzee can share most of their nucleotide sequences yet exhibit significant phenotypic differences is that many of the most important sequence differences alter ________.

TLS Online TPP Program

#Question id: 8840

#Unit 9. Evolution & Diversity of Life Forms

There are at least a dozen known species in the extinct genus Lystrosaurus. If each species was suited to a quite different environment, then this relatively large number of species is likely due to

TLS Online TPP Program

#Question id: 8841

#Unit 9. Evolution & Diversity of Life Forms

Adaptive radiations can be a direct consequence of four of the following five factors. Select the exception.

TLS Online TPP Program

#Question id: 8842

#Unit 9. Evolution & Diversity of Life Forms

In terms of the hierarchical organization of life, a bacterium is at the __________ level of organization, whereas a human is at the __________ level of organization