Refer to the figure. The figure shows two species, a fire-bellied toad and yellow-bellied toad, which occupy different areas of Europe.A small area of overlap between these regions constitutes a hybrid zone.If individuals from the two populations overcome prezygotic reproductive barriers, additional postzygotic barriers may prevent the formation of stable hybrids.Based on this data, which statement is true?
A) B. variegata individuals are moving into the range of B. bombina populations.
B) The ranges of the two species overlap in a long, wide hybrid zone.
C) The hybrid zone spreads from the middle of the range of overlap.
D) B. bombina does not like mountainous terrain.
E) The hybrid zone will likely persist for several generations of toads.

Question

Refer to the figure.  The figure shows two species, a fire-bellied toad and yellow-bellied toad, which occupy different areas of Europe.A small area of overlap between these regions constitutes a hybrid zone.If individuals from the two populations overcome prezygotic reproductive barriers, additional postzygotic barriers may prevent the formation of stable hybrids.Based on this data, which statement is true?
A) B. variegata individuals are moving into the range of B. bombina populations. 
B) The ranges of the two species overlap in a long, wide hybrid zone. 
C) The hybrid zone spreads from the middle of the range of overlap. 
D) B. bombina does not like mountainous terrain. 
E) The hybrid zone will likely persist for several generations of toads.

Quizplus · Accepted Answer

The Answer of Refer to the figure.  The figure shows two species, a fire-bellied toad and yellow-bellied toad, which occupy different areas of Europe.A small area of overlap between these regions constitutes a hybrid zone.If individuals from the two populations overcome prezygotic reproductive barriers, additional postzygotic barriers may prevent the formation of stable hybrids.Based on this data, which statement is true?
A) B. variegata individuals are moving into the range of B. bombina populations. 
B) The ranges of the two species overlap in a long, wide hybrid zone. 
C) The hybrid zone spreads from the middle of the range of overlap. 
D) B. bombina does not like mountainous terrain. 
E) The hybrid zone will likely persist for several generations of toads.

Refer to the Figure