1 / 5

Dichotomous Keys

Dichotomous Keys. Home practice. Dichotomous Keys. Now that we know how organisms are classified. We know some of the characteristics that make up each Kingdom of the Classification System. Let’s Put It to work! And try to find the names of organisms by their characteristics!!!.

lis
Télécharger la présentation

Dichotomous Keys

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Dichotomous Keys Home practice

  2. Dichotomous Keys • Now that we know how organisms are classified. • We know some of the characteristics that make up each Kingdom of the Classification System. • Let’s Put It to work! And try to find the names of organisms by their characteristics!!!

  3. There are many ways to find the names of organisms by looking at their characteristics. • One way to do that is using a • DICHOTOMOUS KEY A system of reading the characteristics in an either/or style.

  4. Example of a diagnostic dichotomous key for some eastern United Statesoaks based on leaf characteristics US Oak Leaf Key A E B F C G D H 1. Leaves usually without teeth or lobes: 2 1. Leaves usually with teeth or lobes: 5 2. Leaves evergreen: 3 2. Leaves not evergreen: 4 3. Mature plant a large tree — Southern live oakQuercusvirginiana 3. Mature plant a small shrub — Dwarf live oakQuercus minima 4. Leaf narrow, about 4-6 times as long as broad — Willow oakQuercusphellos 4. Leaf broad, about 2-3 times as long as broad — Shingle oakQuercusimbricaria 5. Lobes or teeth bristle-tipped: 6 5. Lobes or teeth rounded or blunt-pointed, no bristles: 7 6. Leaves mostly with 3 lobes — Blackjack oakQuercusmarilandica 6. Leaves mostly with 7-9 lobes — Northern red oakQuercusrubra 7. Leaves with 5-9 deep lobes — White oakQuercus alba 7. Leaves with 21-27 shallow lobes — Swamp chestnut oakQuercusprinus http://www.cas.vanderbilt.edu/

  5. Making your own Key • Look for characteristics that separate the “Wacky People” into groups, ie: how many feet or eyes they have. Do they have hair? What is their body shape (round? Square?) • Once they are grouped, separate each groupinto smaller groups based on characteristics in that group. • Go through all characteristics till you have only one “wacky person” with that characteristic. • NAME EACH “Wacky Person”!!! • Give them a Genus and species name. • ex: Sparticus flier • make the name funny and appropriate for class.

More Related