Practice Questions

TLS Online TPP Program

#Question id: 4714

After the drought of 1977, researchers hypothesized that on the Galápagos Island Daphne Major, medium ground finches with large, deep beaks survived better than those with smaller beaks because they could more easily crack and eat the tough Tribulus cistoides fruits. A tourist company sets up reliable feeding stations with a variety of bird seeds (different types and sizes) so that tourists can get a better look at the finches. Which of these events is now most likely to occur to finch beaks on this island?

#Unit 11. Evolution and Behavior

evolution of yet larger, deeper beaks over time, until all birds have relatively large, deep beaks
evolution of smaller, pointier beaks over time, until all birds have relatively small, pointy beaks
increased variation in beak size and shape over time
no change in beak size and shape over time