Practice Questions

TLS Online TPP Program

#Question id: 12538

Some global warming models predict that, if permafrost in the tundra regions in the northern hemisphere melts, atmospheric CO2 levels will increase. Which of the following statements best explains this prediction?

#Unit 10. Ecological Principles

The heat released by the melting of the ice on such a vast scale will cause atmospheric CO2 saturation levels to increase.
All of the tundra producers will die if the permafrost melts, and because the tundra regions are vast in the northern hemisphere the tundra plants will not take part in photosynthetic removal of atmospheric CO2
CO2 tied up in the permafrost ice will be released during a thaw.
All of the undecayed organic material would be subject to decomposition following a thaw, which would lead to incredible increase in global cellular respiration, and add to atmospheric CO2

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TLS Online TPP Program

#Question id: 11110

#Unit 7. System Physiology – Animal

A very deep inspiration that ventilates all alveoli is:

TLS Online TPP Program

#Question id: 10759

#Unit 6. System Physiology – Plant

many secondary metabolites have been suggested to have important ecological functions in plants:

a) they protect plants against being eaten by herbivores (herbivory)

b) they protect plants against being infected by microbial pathogens

c) they serve as attractants for pollinators and seed dispersing animals

d) they serve as agents of plant–plant competition

Which of the following combination from above statements is correct?

TLS Online TPP Program

#Question id: 6991

#Unit 5. Developmental Biology

Metamorphosis of amphibians is triggered by environmental cues that act on the:

TLS Online TPP Program

#Question id: 11217

#Unit 7. System Physiology – Animal

One-way synaptic transmission occurs because ________.

TLS Online TPP Program

#Question id: 30070

#Unit 7. System Physiology – Animal

Effect of catecholamines on the strength of cardiac contraction is called their: