What can result in speciation within a few generations?
A) development of a physical barrier
B) polyploidy arising in a plant species
C) postzygotic isolating mechanisms
D) change in environmental conditions
E) the introduction of a new predator into an area

Question

What can result in speciation within a few generations?​
A) ​development of a physical barrier
B) ​polyploidy arising in a plant species
C) ​postzygotic isolating mechanisms
D) ​change in environmental conditions
E) ​the introduction of a new predator into an area

Quizplus · Accepted Answer

Polyploidy, which is an increase in the number of sets of chromosomes, can occur within a single generation and can result in the immediate reproductive isolation of the polyploid individual from its parent population. This can lead to speciation in a short amount of time.

Answer: C
 Postzygotic isolating mechanisms occur after fertilization has taken place and result in the reduced viability or fertility of hybrid offspring. If these hybrid offspring are unable to successfully reproduce with either parent population or other hybrids, this can lead to speciation within a few generations.

Note: While options A, D, and E can also contribute to speciation, they typically take longer periods of time to achieve.

What Can Result in Speciation Within a Few Generations?​

What Can Result in Speciation Within a Few Generations?