plant organs · plant organs snc2d—2016/10/25. leaves provide a large surface area for...

PlantOrgansSNC2D—2016/10/25

Leaves

Providealargesurfaceareaforphotosynthesis;

Leavescanalsostoreexcesssugar;

Leaveshaveveinsandarecoveredwithawaxycuticle;

Theyalsoregulategasexchangethroughthestomata.

Source:https://qph.ec.quoracdn.net

StemProvidesmainstructuralsupport;

Also,movesnutrientthroughvascularbundles:◦ Phloem:◦ Carriesfoodandnutrients;◦ Isalive.

◦ Xylem:◦ Allowpassageofwater;◦ Isdead.

Vascularbundlesarealsofoundinleavesandroots.

Source:http://www.karensgardentips.com

RootsProvidesstructuralstability;

Canactasstoragearea;

Roothairsusedformineralandwaterabsorption;

Twokindsofroots:

◦ Taproots—Veryfirm,vertical;

◦ Fibrousroots—Horizontal,nearsurface.

Source:https://s-media-cache-ak0.pinimg.com

FlowerReproductiveorgan;

Notallplantsflower;◦ Manytypesofreproduction.

Floweringplantshavedifferentmodesofpollination:◦ Wind;◦ Insects◦ Animals.

Afterpollination,seedsareproducedandputinfruits;◦ Fruitshavedifferentmodesofdispersion.

Source:http://earthobservatory.nasa.gov

Whichoftheseisthemostimportant?

Leaves

Roots

Stem

Flower