Concepts Saved Complete the sentences about island species Complete the sentences about island species. not related During his voyage around the world on the HMS Beagle, Darwin observed that islands plants and animals common to continents. often had In addition, he observed that island species by other species on continents. niches used were often missing Furthermore, he saw that island species are continents. to species on will not occupy related to ces not closely Lastly, Darwin noticed that islands species are species on nearby islands compared to the mainland. more closely often occupy never had related