Scribd
Upload
153 views13 pages

Taxonomic Keys PPT N

The document explains the purpose of taxonomic keys, also known as dichotomous keys, which are used to classify organisms based on their characteristics. It provides a step-by-step guide on how to create a taxonomic key, including examples of classification based on various traits. Additionally, it outlines different types of keys such as indented, simple, pictorial, and branching types.

Uploaded by

anjam
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
153 views13 pages

Taxonomic Keys PPT N

The document explains the purpose of taxonomic keys, also known as dichotomous keys, which are used to classify organisms based on their characteristics. It provides a step-by-step guide on how to create a taxonomic key, including examples of classification based on various traits. Additionally, it outlines different types of keys such as indented, simple, pictorial, and branching types.

Uploaded by

anjam
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 13

4/26/2025

Why Classify?
To study
relationships
between
organisms.

1
4/26/2025

TAXONOMIC KEYS
AKA Dichotomous Keys

An organized system for classifying


things according to characteristics.

Taxonomic Key
• *used to identify an
organism
• A series of paired
statements that describe
physical traits of different
organisms

2
4/26/2025

How to Make a Key


1. Look at the group of things you want to classify
and identify one characteristic that will divide the
group into two groups.

Boys & Not Boys


Boys Not Boys

3
4/26/2025

Next, look at one of the groups and


divide them again.

No Hat Hat

Joe

So, now we just divide the “No


Hat” group one more time.
Does not have
Has Black Hair Black Hair

Bill
Carl

4
4/26/2025

Now, you try to finish the key


for the “Not Boys” group
Jill

Cindy
Suzie

Here’s one way you could do it…


Not Wearing Purple
Clothing (don’t count
Wearing Purple
the hat, it is an
Clothing
accessory).

Suzie

5
4/26/2025

Then…

Patterned Skirt No Patterned Skirt

Jill Cindy

How to Set-up The Key


1. a. Boy………………………Go to 2
b. Not a Boy……………….Go to 4
2. a. Hat……………………….Joe
b. No Hat…………………..Go to 3
3. a. Black Hair……………….Bill
b. Not Black Hair…………..Carl
4. a. Wearing Purple…………Go to 5
b. Not Wearing Purple…….Suzie
5. a. Patterned Skirt…………..Jill
b. No Patterned Skirt………Cindy

6
4/26/2025

Make a Dichotomous Key:

dog
pig

sea turtle

cow
fish

A Possible Key
1. a. Lives in water………………………..Go to 2
b. Does not live in water……………….Go to 3
2. a. Has a shell……………………………Turtle
b. Has no shell…………………………..Fish
3. a. Has horns…………….………………Cow
b. No horns…………………..………….Go to 4
4. a. Has hoofed feet………………………Pig
b. Does not have hoofed feet………….Dog

7
4/26/2025

1. INDENTED KEY

2. SIMPLE NON-BRACKET KEY

8
4/26/2025

3. SIMPLE BRACKET KEY

4. GROUPED TYPE KEY

9
4/26/2025

5. COMBINATION KEY

6. PICTORIAL KEY

10
4/26/2025

7. BRANCHING TYPE KEY

11
4/26/2025

8. CIRCULAR KEY

12
4/26/2025

9. BOX TYPE KEY

The End

13

You might also like