Questions
BIS 002B Sections A and B SQ 2025 Practice Midterm #2
Multiple choice
Geospiza fortis is a seed-eating finch that lives on Daphne Major, a small island in the Galápagos archipelago. Geospiza fuliginosa is a second species of seed-eating finch found in the Galápagos islands, and this species occurs together with G. fortis on a larger island called Santa Cruz. The graphs below show the distribution of beak sizes of G. fortis when it co-occurs with G. fuliginosa vs. when it occurs alone. Based only on these data, you can conclude that (select all that apply).
Options
A.Beak size is a heritable trait for Geospiza fortis
B.Beak size is a heritable trait for Geospiza fuliginosa
C.There is variation in beak size in BOTH species
D.The beak size of Geospiza fortis differs in sympatry and allopatry in a way that is consistent with character displacement
E.The beak size of Geospiza fuliginosa differs in sympatry and allopatry in a way that is consistent with character displacement
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Step-by-Step Analysis
First, observe that the data present beak size distributions for two scenarios: Geospiza fortis when it lives alone on Daphne Major (upper graph) and Geospiza fuliginosa together with G. fortis on Santa Cruz alongside G. fortis (lower graphs). This setup allows us to assess variation within and between the species, as well as potential displacement effects.
Option 1: Beak size is a heritable trait for Geospiza fortis. While beak size shows variation, the graphs do not provide any......Login to view full explanationLog in for full answers
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