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TLS Online TPP Program

#Question id: 9150

For mountain ranges that are subjected to prevailing winds, why is the climate drier on the leeward (downwind) side?

#Unit 9. Diversity of Life Forms
  1. Deserts create dry conditions on the leeward side of mountain ranges.

  2. The sun illuminates the leeward side of mountain ranges at a more direct angle, converting to heat energy, which evaporates most of the water present.

  3. Pushed by the prevailing winds on the windward side, air is forced to rise, cool, condense, and drop its precipitation, leaving drier air to descend the leeward side.

  4. Air masses pushed by the prevailing winds are stopped by mountain ranges and the moisture is used up in the stagnant air masses on the leeward side.

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TLS Online TPP Program

#Question id: 12576

#Unit 10. Ecological Principles

Estimates of current rates of extinction
TLS Online TPP Program

#Question id: 12577

#Unit 10. Ecological Principles

During  a  field  trip,  an  instructor  touched  a  moth  resting  on  a  tree  trunk.  The  moth  raised  its  forewings  to  reveal large eyespots on its hind wings. The instructor asked why the moth lifted its wings. One student answered that sensory  receptors  had  fired  and  triggered  a  neuronal  reflex  culminating  in  the  contraction  of  certain  muscles.  A second student responded that the behaviour might frighten predators. Which statement best describes these explanations?
TLS Online TPP Program

#Question id: 12579

#Unit 10. Ecological Principles

Which of the following probably contains the highest concentration of toxic pollutants (biological magnification)? 
TLS Online TPP Program

#Question id: 12580

#Unit 10. Ecological Principles

When levels of CO2 are experimentally increased, C3 plants generally respond with a greater increase in productivity than C4 plants. This is because
TLS Online TPP Program

#Question id: 12581

#Unit 10. Ecological Principles

Which of the following causes an increase in the intensity of UV radiation reaching the Earth? 
TLS Online TPP Program

#Question id: 12582

#Unit 10. Ecological Principles

Which of  the  following  describes carbon dioxide,  methane, and  water  vapor re-reflecting infrared radiation back toward Earth?