Presentation on theme: "What Adaptations Do Plants Have to Disperse Seeds?"— Presentation transcript:
1What Adaptations Do Plants Have to Disperse Seeds?
2Plants rely on their environment to disperse seeds. WindAnimal TransportExternalInternalOther: burying seedsDrop to ground
3Wind DispersalSome structures allow seeds to be easily carried in the wind.AchenePappus
4Animal TransportSome plants depend upon animals to disperse their seeds. There are three variations of animal dispersal:External TransportExamples of seed structures for external transport:HooksBarbsInternal TransportSeeds are encased in fleshy fruitsInadvertent dispersal (burying seeds)
5Hooks and Serrated Edges Projections extending from a seed case attach onto a passing animal, carrying the seed to a new location.
7Internal DispersalFleshy fruits surround seeds to be consumed and expelled by animals.
8Other Animal Assisted Dispersal The Oak tree depends upon the squirrel for its seed dispersal.Squirrels bury acorns in the Fall and often forget where they are in the winter. These seeds then sprout new trees.
9Drop Dispersal Some plants simply drop the seeds on the ground. Individual seedWhat are some disadvantages of this method?
10What adaptations do seeds have to assist in dispersal? Identify the adaptation and type of dispersal for each of the following pictures.12345