TLS Online TPP Program

#Question id: 159


The chirality of an amino acid results from the fact that its alpha carbon:

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. has no net charge.

  2. is a carboxylic acid.

  3. is bonded to four different chemical groups.

  4. is in the L absolute configuration in naturally occurring proteins.

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TLS Online TPP Program

#Question id: 9166

#Unit 9. Diversity of Life Forms

If global warming continues at its present rate, which biomes will likely take the place of the coniferous forest (taiga)?

TLS Online TPP Program

#Question id: 9167

#Unit 9. Diversity of Life Forms

If you conclude that vegetation at every point on Earth exactly resembles the predicted biome distribution in a climograph, then ________.

TLS Online TPP Program

#Question id: 9168

#Unit 9. Diversity of Life Forms

Which of the following statements best describes the interaction between fire and ecosystems?

TLS Online TPP Program

#Question id: 9169

#Unit 9. Diversity of Life Forms

In areas of permafrost, stands of black spruce are frequently observed in the landscape, while other tree species are noticeably absent. Often these stands are referred to as "drunken forests" because many of the black spruce often "lean over" (that is, they are displaced from their normal vertical alignment). What is the most likely explanation for the unusual growth of these forests in this marginal habitat?


TLS Online TPP Program

#Question id: 9170

#Unit 9. Diversity of Life Forms

Which of the following is an important feature of most terrestrial biomes?

TLS Online TPP Program

#Question id: 9171

#Unit 9. Diversity of Life Forms

Suppose that the number of bird species is determined mainly by the number of vertical strata found in the environment. If so, in which of the following biomes would you find the greatest number of bird species?