After the drought of 1977, researchers hypothesised 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?Question 4Select one:a.evolution of yet larger, deeper beaks over time, until all birds have relatively large, deep beaksb.evolution of smaller, pointier beaks over time, until all birds have relatively small, pointy beaksc.increased variation in beak size and shape over timed.no change in beak size and shape over timeClear my choice

Finches on the Galapagos islands exhibit remarkable variation in the shape of their beaks. What best explains this variation?Multiple choice question.Differences in their feeding habitsSubtle differences in the climate of different Galapagos islandsDifferences in their predatorsDifferences in their breeding strategies

How did natural selection shape the evolution of finches on the Galápagos Islands?Multiple choice question.Several different bird species migrated from the mainland to the Galápagos Islands and occupied the habitats to which they were best suited.Birds that used their beaks to crack bigger seeds acquired larger beaks in their lifetime and passed this trait on to their offspring.Birds with different heritable differences were able to better survive and reproduce in different habitats.

What did Darwin observe about the finches he collected from the Galápagos Islands?a. They all had identical beak shapesb. They were unrelated to each otherc. They evolved from South American speciesd. They had different beak shapes suited to their diet

Galapagos finches with powerful thick beaks typically eat large Blank______.Multiple choice question.seedsgrubsinsectsfruits

Galapagos finches are a famous example of adaptive radiation, a phenomenon that occurs when many species occupying different ecological and geographic niches evolve from a common ancestor. A team of researchers at Harvard University recently used specially designed mathematical models to predict possible adaptive beak shapes for different finches based on their niches. However, most of these ‘predicted’ beak shapes never appeared among Galapagos finches because of physical constraints on beak development. These findings suggest that -------.Which choice most logically completes the text?Galapagos finches could have evolved an even greater variety of beak shapes.eliminatethe beak shapes of Galapagos finches evolved as a result of both adaptive pressure and physical constraints.eliminatethere may be many undiscovered species of Galapagos finches.eliminatethe mathematical models of the Harvard team made flawed assumptions that undermined their predictions.