DS109-Intro To Dichotomous Keys & Unit 11 Rev
Unit 11: Classification & EcologyBiology IDAYSHEET 109: Introduction to Dichotomous Keys & Unit 11 henanswerthequestions.Ecosystems change over time. In some cases, changes result from natural events such as floods,forest fires, or volcanic eruptions. In other cases, changes to ecosystems are caused by humanactivities, such as cutting down forests or filling in wetlands to make land available for homes orfarms. These events are called disturbances.Succession is the process in which the communities in ecosystems are replaced by newercommunities. Succession that occurs in an area where no communities already exist is calledprimary succession. Primary succession can take place on a newly formed volcanic island or in anarea of bare rock exposed by a retreating glacier.Primary succession takes place on bare land with no soil. The first species to live in the area arecalled pioneer species. These species must be very tough, with adaptations that help them survivethe harsh conditions. Pioneer species are usually mosses or lichens.Succession that takes place in an area where organisms previously lived is called secondarysuccession. This type of succession takes place after an existing ecosystem has been disturbed insome way, such as by a fire or flood. In secondary succession, there is already soil in place.The final community that results from succession is called the climax community. The climaxcommunity is diverse, and stable. It will stay in place until another disturbance occurs.1. Which of these would be most likely to grow on a small island that was formed by a volcaniceruption?A. climbing vinesB. hardwood treesC. bushesD. lichens2. Which term refers to the final stage of a forest’s development?A. pioneer forestB. secondary forestC. climax forestD. conifer forest3. Based on your reading, what type of succession follows when a farmland is abandoned?A. primary successionB. secondary succession4. Based on your reading, what type of succession occurs on an area of bare rock?A. primary successionB. secondary succession1
loselyrelated.8.snakes&crocodiles snakes&frogs9.rats&cats cats&dogs10.insects&lobsters insects&birds11.lions&tigers lions&cougars12.foxes&rats foxes&dogs13.cats&dogs cats&lions2
Activity 1: Introduction to Dichotomous asnotail,aggressive.Rajus123456783
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Activity2:MoreDichotomousKeyPractice1. What is the main feature being used for the contrasting character?2. Use the key to determine the genus of each of the larvae.A.B.C.D.E.F.G.6
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DichotomousKeytotheKingdomsofLife1a.Prokaryotic goto21b.Eukaryotic .goto32a.Livesinextremeenvironments .Archaebacteria2b.Doesnotliveinextremeenvironments . Eubacteria3a.Unicellular Protista3b.Multicellular goto44a.Autotrophic Plantae4b.Heterotrophic .goto55a.Feedsbyabsorption .Fungi5b.Feedsbyinternaldigestion;motile .Animalia8
wit.ABCDEFHIGFish Dichotomous KeyStep 1If fish shape is long and skinny then go to step 2If fish shape is not long and skinny, then go to step 3Step 5If fish has spots, then go to step 6If fish does not have spots, then go to step 7Step 2If fish has pointed fins, it is a trumpet fishIf fish has smooth fins, it is a spotted moray eelStep 6If fish has chin "whiskers," it is a spotted goat fishIf fish does not have chin "whiskers," it is a band-tailpufferStep 3If fish has both eyes on top of the head, then go toStep 7step 4If fish has stripes, then go to step 8If fish has one eye on each side of the head, then go to If fish does not have stripes, it is a glassy sweeperstep 5Step 4Step 8If fish has long whip-like tail, it is a spotted eagle ray If fish has a v-shaped tail, it is a squirrel fishIf fish has short, blunt tail, it is a peacock flounderIf fish has a blunt tail, it is a glass-eye snapper9
Fish Dichotomous Key Step 1 If fish shape is long and skinny then go to step 2 If fish shape is not long and skinny, then go to step 3 Step 5 If fish has spots, then go to step 6 If fish does not have spots, then go to step 7 Step 2 If fish has pointed fins, it is a trumpet fish If fish has smooth fins, it is a spotted moray eel Step 6
6 fla-keys.com fla-keys.co.uk fla-keys.it fla-keys.de fla-keys.ie fla-keys.fr fla-keys.nl fla-keys.beKeys Traveler Keys Traveler fla-keys.com fla-keys.co.uk fla-keys.it fla-keys.de fla-keys.ie fla-keys.fr fla-keys.nl fla-keys.be7 In Islamorada, life is mostly about fishing. Backcountry sport fishing
Using Dichotomous Keys and Fish Classification The identification of biological organisms can be greatly simplified using tools such as dichotomous keys. A dichotomous key is an organized set of couplets of exclusive characteristics of biological organisms. You simply compare the
Using a Dichotomous Key Now identify the “Wacky Person” using the dichotomous key on page 4. Wacky People Dichotomous Key A dichotomous key gives clues in pairs of statements. With each character, start with the first pair of statements. Decide which description matches your character best and follow the line to the right.
example, each dichotomous key in this Gizmo is used to identify six to eight related species found within a geographic region. Goal: Identify a variety of organisms using dichotomous keys. 1. Practice: Use the Gizmo’s dichotomous key to identify all the buttercups. Canadian Rockies Buttercups Organism Common name Scientific name A B C
with a keyway of the appropriate size and style for the key to be used. Shaft keys are available in a variety of types and include Parallel Keys, Square Keys, Flat Keys, Rectangular Keys, Woodruff Keys, Plain Taper Keys, Gib-Head Taper Keys, Perpendicular Pins, and the Feather Key. Parallel keys are inexpensive, readily
1. Switch dichotomous keys with another group. 2. Obtain the fruit for testing the dichotomous key. 3. Identify the fruit type for the test fruits. 4. Compare your model and dichotomous key to other groups. Teacher Preparation and Tips Check for contact food allergies and make sure students wear gloves and glasses.
(a) Shunk keys, (b) Saddle keys, (c) Tangent keys, (d) Round keys, and (e) Splines. We shall now discuss the above types of keys, in detail, in the following sections. 6.2.1 Sunk Keys The sunk keys are provided half in the keyway of the shaft and hal
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