The upper forelimbs of humans and bats have fairly similar skeletal structures, whereas the corresponding bones in whales have very different shapes and proportions. However, genetic data suggest that all three kinds of organisms diverged from a common ancestor at about the same time. Which of the following is the most likely explanation for these data? a. Forelimb evolution was adaptive in people and bats, but not in whales. b. Natural selection in an aquatic environment resulted in significant changes to whale forelimb anatomy. c. Genes mutate faster in whales than in humans or bats. d. Whales are not properly classified as mammals.

Video transcript

Hello everyone here We have a question that says a certain species of moth living in the meadows has green colored wings. The same species of moth can also be found in an industrialized city but has developed dark brown colored wings. What could be the possible reason for such difference? A moth have adapted to the smoke and sit in the city and were naturally selected due to their brown color. Be moths have changed their diet, which caused the mutation of their wings. See the gene specifying that green color wing was deleted from the moths genome, or dis speciation may have taken place due to geographic isolation. A green colored moth would definitely stand out in a city with suit and smoke and would be more seen by predators. So the moths have adapted to the smoke and sit in the city and were naturally selected due to their brown color. Thank you for watching. Bye.