Which of the following observations helped Darwin shape his concept of descent with modification? a. Species diversity declines farther from the equator. b. Fewer species live on islands than on the nearest continents. c. Birds live on islands located farther from the mainland than the birds' maximum nonstop flight distance. d. South American temperate plants are more similar to the tropical plants of South America than to the temperate plants of Europe.

Video transcript

Hi everyone here, we have a question that, says Darwin observed that the beak of the finch species in the Galapagos island is similar yet has distinct differences. He then postulated that the beak of an ancestral species had adapted over time. According to Daren, what could be the reason for such differences in the finch species? Beaks a due to the differences in predator, be due to the differences and food sources see due to chemical contamination or d due to radioactive elements. So Darwin looked at these birds beaks and thought that it could be due to differences in food sources. The ancestor had adaptations to help reach certain food sources, like a thinner beak for reaching the nooks and crannies and trees. And these mutations caused by adaptations will start to grow. They'll become more and more prevailing, giving way to the emergence of a new species. So our answer here is b due to the differences in food sources. Thank you for watching. Bye.