1. Early development and disappearance of hind limbs in dolphins 2. Evolution pattern represented 3. Evolutionary mechanism explaining low genetic variation in wolves

Question: 11. During early stages of development, dolphin embryos begin to develop hind limbs. By the time the dolphin fetuses are fully developed, the hind limbs have disappeared. Which statement best explains the early development and then the disappearance of hind limbs in dolphins? A.The early ancestors of dolphins had hind limbs. B.The genes that control the development of hind limbs are destroyed as the fetus develops. C.Dolphin fetuses change their development to adapt to an aquatic environment. D.Dolphins are evoling to become terrestrial animals. A flock of migratory birds gets divided in a storm while headed for warmer climates. Half of the flock reaches the warmer climate and half of the flock lands on a new island and stays. Over time, members of the flock that settled on the island develop characteristics that increase their rate of survival on the island. The population on the island eventually evolves into a different species than their ancestors. Which of the following patterns of evolution does this represent? A.Parallel evolution B.Coevolution C.Divergent evolution D.Convergent evolution 17. As part of a wildlife conservation program, researchers take a small population of wolves and relocate them to an island. After several generations, researchers analyze the genomes of the wolves in the population and determine that there is little genetic variation in the population. Which evolutionary mechanism BEST explains the low level of genetic variation of these wolves? A.Mutation B.Founder effect C.Gene flow D.Recombination