Dichotomous key

In a dichotomous key, organisms should be classified based on their

• observable features (e.g. legs, colouring, size)

• body colour

• observable features that don't change

• pattern of their body e.g. stripes, spots etc

How many options should every branch in a dichotomous key have?

• 1

• 2

• 3

• 4

Why do scientists use dichotomous keys?

• To arrange organisms based on habitat

• To determine evolutionary history

• To identify different organisms

• To analyse feeding habits

Which of the following is a centipede?

• 
• 
• 
• 

Identify leaf F

• Cydonia

• Magnolia

• Aesculus

• Fraxinus

• Ilex

What feature does this dichotomous key use to identify organisms?

• Number of legs

• Body colour and pattern

• Presence of wings

• Body covering

Which of the following organisms is M. erminea?

• A

• B

• C

• D

• E

Tags

NGSS.MS-LS4-2

• A

• B

• C

• D

Tags

NGSS.MS-LS4-2

• A

• B

• C

• D

Tags

NGSS.MS-LS4-2

• A

• B

• C

• D