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Item CA015003: Organisms that have more traits in common are probably more closely related than organisms with fewer traits in common.

The table below shows the presence or absence of traits in seven different species.

Character

Frog

Bird

Crocodile

Whale

Pig

Gorilla

Blowhole

 

 

 

Yes

 

 

Body hair

 

 

 

Yes

Yes

Yes

Amniotic egg

 

Yes

Yes

Yes

Yes

Yes

Forelimbs

Yes

Yes

Yes

Yes

Yes

Yes

Backbone

Yes

Yes

Yes

Yes

Yes

Yes

Holes in Skull

 

Yes

Yes

 

 

 

 

Based only on the traits presented in the table, which organism is most closely related to whales?

  1. Pigs
  2. Birds
  3. Gorillas
  4. Not enough information is provided
Distribution of Responses
Chart showing distrubtion of responses for Item EN015003
Points Earned
Group Correct Total Percent
Overall 290 558 52%
Grades
  6–8 14 25 56%
  9–12 257 498 52%
Gender
  Male13324355%
  Female13627450%
Primary Language
  English25650251%
  Other141974%

View data table

Distribution of Responses
Chart showing distrubtion of responses for Item EN015003
Points Earned
Group Correct Total Percent
Overall 157 294 53%
Grades
  6–8 15 23 65%
  9–12 129 247 52%
Gender
  Male6110956%
  Female8717151%
Primary Language
  English14326454%
  Other3933%

View data table

Distribution of Responses
Chart showing distrubtion of responses for Item EN015003
Points Earned
Group Correct Total Percent
Overall 120 281 43%
Grades
  6–8 1 3 33%
  9–12 111 257 43%
Gender
  Male5913245%
  Female5714041%
Primary Language
  English11025443%
  Other61155%

View data table

Disciplinary Core Ideas
LS4.A Anatomical similarities and differences between various organisms living today and between them and organisms in the fossil record, enable the reconstruction of evolutionary history and the inference of lines of evolutionary descent.
Notes
NGSS includes the idea that anatomical similarities and differences can be used to infer lines of evolutionary descent and, by extension, degree of relatedness, but it does not say explicitly that the greater the degree of similarity the more closely organisms are related.