Dichotomous keys
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Dichotomous keys are tools used to identify unknown items. They work by presenting two choices at each step, narrowing down the options until the item is identified. An example key is provided that uses three steps to distinguish between a ladybug, grasshopper, dragonfly, and housefly based on characteristics like wing coverage and wing position. The document concludes by constructing a sample key to identify strawberries, apples, oranges, and bananas based on color and shape traits.
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aziz sancar nobel prize winner: from mardin to nobel
The binding of cosmological structures by massless topological defects
The binding of cosmological structures by massless topological defects
Unlocking the mysteries of reproduction: Exploring fecundity and gonadosomati...
Unlocking the mysteries of reproduction: Exploring fecundity and gonadosomati...
Applied Science: Thermodynamics, Laws & Methodology.pdf
Applied Science: Thermodynamics, Laws & Methodology.pdf
Dichotomous keys
- 1. Notes: Dichotomous Keys (pg 4)
- 2. Notes: Dichotomous Keys • Tool for figuring out the identity of something
- 3. Dichotomous Keys • Tool for figuring out the identity of something • Dichotomous = divided into 2 parts
- 4. Using a key • At each step, you are given 2 choices • Each alternative leads to 2 more choices, until the item is identified
- 5. Example (write this down) 1. a. wings covered …………………..go to step 2 b. wings not covered ……………….go to step 3 2. a. body is round ………..................ladybug b. body is elongated……….............grasshopper 3. a. wings point outward ………........dragonfly b. wings point backward…………...housefly
- 6. Output (pg 5) Construct a dichotomous key for the following objects. Begin your key with: 1. a. Object is red……………..go to 2 b. Object is not red…………go to 3
- 7. 1. A. Object is red……………..go to 2 b. Object is not red…………go to 3 2. a. Has a green stem………Strawberry b. Has a brown stem……….Apple 3. a. Object is round.…………Orange b. Object is not round….….Banana