Practice Questions

TLS Online TPP Program

#Question id: 9185

Plants are affected by an array of pathogens. Which of the following is a plant defense against disease?

#9. Diversity of Life Forms

cells near the point of infection destroying themselves to prevent the spread of the infection
production of chemicals that kill pathogens
acquiring gene-for-gene recognition that allows specific proteins to interact so that the plant can produce defenses against the pathogen
All of the above are plant defenses against disease.

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TLS Online TPP Program

#Question id: 12577

#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

#10. Ecological Principles

Which of the following probably contains the highest concentration of toxic pollutants (biological magnification)?

TLS Online TPP Program

#Question id: 12580

#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

#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

#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

#10. Ecological Principles

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