Evidence for Evolution & Dichotomous Keys

What is a dichotomous key used for in science?

• To follow natural selection

• Classify organisms

• To follow mutations

• To prepare to make a cladogram

An illustration and a dichotomous key are given. What is the correct classification for this organism?

• Class Insecta
• Order Amblygygi
• Order Araneae
• Order Scorpiones

Tags

NGSS.MS-LS4-2

Analogous structures show common ancestry.

• 
• 
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Tags

NGSS.MS-LS4-2

Which of the following pieces of evolutionary evidence contains both homologous and vestigial structures?

• observing the fossil record

• comparing embryology

• comparing biochemistry

• comparing anatomy

Survival of the fittest means......

• Only strong organisms survive

• Organisms best adapted to their environment survive the best

• Organisms that are most attractive survive the best

• Only organisms that have homologous structures survive

Tags

NGSS.MS-LS4-4

Which of the following are HOMOLOGOUS structures?

• bee wings and bird wings

• legs on a beetle and legs on a cat

• whale flipper and bat wing

• human eyebrows and ant antenna

Tags

NGSS.MS-LS4-2

Which images illustrate ANALOGOUS structures?

• 1, 2

• 1, 3

• 2, 3

• 1, 2, 3

These limbs provide evidence of common ancestry because they....

• have the same basic structure

• Perform the same function

• Are the same size

• Are parts of mammals

Tags

NGSS.MS-LS4-2

All these organisms have similar arm bones. What is the reason for this?

• The function of these bones is the same in all animals

• They live in similar environments

• They have a common ancestor

• All organisms resemble humans

Tags

NGSS.MS-LS4-2

The hind leg bones in a whale are examples of....

• homologous structures

• analogous structures

• fossils

• vestigal structures

Tags

NGSS.MS-LS4-2