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TLS Online TPP Program

#Question id: 10708

Which of the following statements is a likely explanation for why invasive species take over communities into which they have been introduced?

#Unit 10. Ecological Principles
  1. Invasive species are less efficient than native species in competing for the limited resources of the environment.
  2. Invasive species are not held in check by the predators and agents of disease that have always been in place for native species.
  3. Invasive species have a higher reproductive potential than native species.
  4. Invasive species come from geographically isolated regions, so when they are introduced to regions where there is more competition, they thrive
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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?
TLS Online TPP Program

#Question id: 12583

#Unit 10. Ecological Principles

Which of the following is caused by excessive nutrient runoff into lakes?