Asked by jay
Galapogos tortoises have a number of shell variations, shown right. What are the advantages of choosing a system examining the beaks of finches instead of the shells of tortoises? Check all that apply.
Birds have shorter lifespans, making generations shorter.
The bird population is likely much greater, allowing for more data.
Tortoises move too slowly for natural selection to influence shell phenotype.
Birds are easier to track and monitor.
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- Birds have shorter lifespans, making generations shorter. — Yes. Shorter generations let evolutionary change be observed more quickly.
- The bird population is likely much greater, allowing for more data. — Yes. Larger sample sizes improve statistical power and detection of variation.
- Birds are easier to track and monitor. — Yes. Finches are easier to catch, mark, and observe than large, long‑lived tortoises.
- Tortoises move too slowly for natural selection to influence shell phenotype. — No. Movement speed does not prevent natural selection; shell traits can be selected on regardless of mobility.
- The bird population is likely much greater, allowing for more data. — Yes. Larger sample sizes improve statistical power and detection of variation.
- Birds are easier to track and monitor. — Yes. Finches are easier to catch, mark, and observe than large, long‑lived tortoises.
- Tortoises move too slowly for natural selection to influence shell phenotype. — No. Movement speed does not prevent natural selection; shell traits can be selected on regardless of mobility.
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