Adults emerging per 150 eggs of each fly type placed on each fruit type (egg-to-
ID: 45323 • Letter: A
Question
Adults emerging per 150 eggs of each fly type placed on each fruit type (egg-to-adult survival)
Poisontree seeds from main island
Poisontree seeds from small island
Seeds from other species of trees from main island
Flies from main island
0
0
145
Flies from small island
140
140
20
-Describe one scenario in which the ability to survive on Poisontree seeds could lead to the evolution of a premating isolating barrier between flies from the small island and flies on the main island. (Hint: this is where you get to use your imagination, but we are looking for biologically plausible scenarios!)
Poisontree seeds from main island
Poisontree seeds from small island
Seeds from other species of trees from main island
Flies from main island
0
0
145
Flies from small island
140
140
20
Explanation / Answer
There are few possible scenarios, in which the ability to survive on poisontree seeds could lead to the evolution of a premating isolating barrier.
Parapatric model of speciation is one the model that will differentiate the two specices even if they existing on poison tree seeds. The ecological isolation barrier will still exist between the flies of small island and main island.
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