Which statement about dispersal is false? a. Dispersal is a common component of the life cycles of plants and animals. b. Colonization of devastated areas after floods or volcanic eruptions depends on dispersal. c. Dispersal occurs only on an evolutionary time scale. d. The ability to disperse can expand the geographic distribution of a species.

Video transcript

Welcome back. Here's our next question. Which of the following is true about active dispersal. So when we think about dispersal we think about um organisms moving from one location to another. And here we want to talk about active dispersal. So let's look at our choices. Choice A. Says organisms are moved to one location without assistance. So yes that is a correct description of active dispersal. Um The organisms are moving themselves um an example would be migration. So migrating bats or birds or butterflies um they are moving themselves to a different location without any assistance. So that choice A. Is a correct answer. And well just to be thorough look through our other answers and see why they're not correct. Choice B says organisms need assistance to move from one place to another so that might involve something being carried along with another organism carried along on its body. So Choice B is not correct because active dispersal involves the animal moving itself not needing assistance to do that. So Choice B. Is not correct. Choice C. Says most of the organisms doing active dispersal are cecil organisms. Cecil means staying in one place, so no choice C. Is not correct. Cecil organisms are not going to move without assistance. Choice D. Says pollens being dispersed by bees is an example of active dispersal. Well the pollens are not actively dispersing themselves. They are being carried along by the bees so that is not active dispersal and Choice D. Is not correct. So our correct answer is a organisms are moved to one location without assistance as being the true description of active dispersal. See you the next video.