How did Peter and Rosemary Grant show that the beak size of finches on Daphne Major is affected by natural selection?Multiple choice question.In dry years more small seeds were produced on the island and the average beak size of finches decreased.In dry years fewer large seeds were produced on the island and the average beak size of finches decreased.In dry years, fewer small seeds were produced on the island and the average beak size of finches increased.

The Grants were able to show that the changes in beak depth they observed in finches were due to genetic differences by determining that the beak size of parents was similar to the beak size of their

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

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.

Charles Darwin observed several species of finches on the Galápagos Islands, each with distinct beak shapes and sizes. These differences appeared to be adaptations to the specific types of food available on each island. For example, finches on islands with abundant hard seeds had stronger, thicker beaks, while those on islands with insects had thinner, sharper beaks.Which of the following observations by Darwin most directly led to his theory of natural selection?Question 2Answera.Variation in Traitsb.Adaptation to the Environmentc.Overproduction of Offspringd.Inheritance of Traits

After a drought, the only species of tree that survived had very large seeds. Many generations later, the finches with largest beaks increased in number and the ones with smaller and medium-sized beaks decreased in number.How is this BEST explained?Elimination ToolSelect one answerAThe finches with small and medium beaks had to work harder than those with larger beaks to crack open the large seeds. The more they used their beaks, the larger their beaks became, so they were able to obtain enough food to survive, reproduce, and pass the traits of large beaks to the next generation.BThe finches with the large beaks were better at eating the large seeds than those with smaller beaks, so only the birds with large beaks obtained enough food to survive, reproduce, and pass the trait of large beaks to the next generation.CThe finches with smallest beaks grew their beaks so that they would be better able to eat the large seeds and get enough food to survive, reproduce, and pass the trait of large beaks on to the next generation.DIt was a chance occurrence that all the individual finches’ beaks in the next generation were larger. Therefore, they were able to eat the large seeds and get enough food to survive, reproduce, and pass the trait of large beaks to the next generation.