The most plausible hypothesis to explain why species richness is higher in tropical than in temperate regions is that

 A) tropical communities are older.

 B) tropical regions generally have more available water and higher levels of solar radiation.

 C) higher temperatures cause more rapid speciation.

 D) diversity increases as evapotranspiration decreases.

#Question id: 11131

#I Life Science/ Life Sciences Group – I-V

Which statement concerning the generation of an action potential is correct?

#Question id: 11131

#SCPH28 | Zoology

Which statement concerning the generation of an action potential is correct?

#Question id: 11132

#I Life Science/ Life Sciences Group – I-V

The sensation of temperature is signaled mainly by warm and cold receptors whose sensory fibers travel in association with the sensory fibers carrying pain signals. Which of the following statements best characterizes the transmission of signals from warm receptors?

#Question id: 11132

#SCPH28 | Zoology

The sensation of temperature is signaled mainly by warm and cold receptors whose sensory fibers travel in association with the sensory fibers carrying pain signals. Which of the following statements best characterizes the transmission of signals from warm receptors?

#Question id: 11133

#I Life Science/ Life Sciences Group – I-V

Which of the following statements accurately describes a feature of temperature sensation by the nervous system?

#Question id: 11133

#SCPH28 | Zoology

Which of the following statements accurately describes a feature of temperature sensation by the nervous system?