Types of Speciation Choice
For each of the following, choose one of the two items in parentheses that correctly completes
the statement.
Instant speciation by polyploidy in many flowering plant species represents
(parapatric/sympatric) speciation.
1.
In the past, hybrid orioles existed in a hybrid zone between eastern Baltimore orioles
and western Bullock orioles; today, hybrid orioles are becoming less frequent in this example of
(allopatric/parapatric) speciation.
2.
In the absence of gene flow between geographically separate populations, genetic
divergence may become sufficient to bring about (allopatric/parapatric) speciation.
3.
The uplifted ridge of land we now call the Isthmus of Panama divides the Atlantic Ocean
from the Pacific Ocean and forms a natural laboratory for biologists to study
(allopatric/sympatric) speciation.
4.
In the 1800’s, a major earthquake changed the course of the Mississippi River; this
isolated some populations of insects that could not swim or fly, and set the stage for
(parapatric/allopatric) speciation.
5.