Refer to the figure, showing Earth's biogeographic regions.(Red arrows show time, in millions of years, since land masses came together.Black arrows show time since two land masses separated.) Some regions, including the Palearctic and Ethiopian, and the Palearctic and Oriental, have been moving toward each other.Based on the information given, what would be the expected response of species as these regions come back together?
A) Speciation rates will increase because species will compete more.
B) Speciation rates will decrease because the regions are closer together.
C) Speciation will occur separately in each region because of barriers to dispersal.
D) Species will mix in the two regions, but rates of speciation cannot be determined.
E) Species will mix in the two regions, but rates of speciation will be too gradual to be measured.

Question

Refer to the figure, showing Earth's biogeographic regions.(Red arrows show time, in millions of years, since land masses came together.Black arrows show time since two land masses separated.)  Some regions, including the Palearctic and Ethiopian, and the Palearctic and Oriental, have been moving toward each other.Based on the information given, what would be the expected response of species as these regions come back together?
A) Speciation rates will increase because species will compete more. 
B) Speciation rates will decrease because the regions are closer together. 
C) Speciation will occur separately in each region because of barriers to dispersal. 
D) Species will mix in the two regions, but rates of speciation cannot be determined. 
E) Species will mix in the two regions, but rates of speciation will be too gradual to be measured.

Quizplus · Accepted Answer

The Answer of Refer to the figure, showing Earth's biogeographic regions.(Red arrows show time, in millions of years, since land masses came together.Black arrows show time since two land masses separated.)  Some regions, including the Palearctic and Ethiopian, and the Palearctic and Oriental, have been moving toward each other.Based on the information given, what would be the expected response of species as these regions come back together?
A) Speciation rates will increase because species will compete more. 
B) Speciation rates will decrease because the regions are closer together. 
C) Speciation will occur separately in each region because of barriers to dispersal. 
D) Species will mix in the two regions, but rates of speciation cannot be determined. 
E) Species will mix in the two regions, but rates of speciation will be too gradual to be measured.

Refer to the Figure, Showing Earth's Biogeographic Regions