QUESTION IMAGE
Question
hat separates rabbits/primate from crocodiles on this cladogram?
- which organism is most related to the rodents and rabbits on this cladogram?
- what 5 traits do the bird and its closest relative share?
a. \t\t d.
b. \t\t e.
c.
- which organism will have dna most similar to the bird? why?
- which organism’s dna will differ the most from the bird? why?
each letter represents a derived characteristic
***match the letter to its characteristic.
- ____ wings
- ____ 6 legs
- ____ segmented body
- ____ double set of wings
- ____ back appendages
- ____ crushing mouthparts
- ____ legs
- ____ curly antennae
Question 9:
To determine the organism most related to rodents and rabbits, we analyze the cladogram. The primates branch off near the rodents/rabbits branch (sharing the "Hair" trait node), closer than other organisms (sharks, ray - finned fish, amphibians, crocodiles, birds). So primates are most related.
First, identify the bird's closest relative from the cladogram (crocodiles, as they share the "Eggs with shells" and "Amniotic egg" nodes, plus more ancestral traits). The shared traits are: 1. Vertebrae (all vertebrates here have this), 2. Bony skeleton, 3. Four limbs, 4. Amniotic egg, 5. Eggs with shells.
In a cladogram, organisms that share a more recent common ancestor have more similar DNA. Birds and crocodiles share a relatively recent common ancestor (closer branch point, sharing "Eggs with shells" and "Amniotic egg" etc.). So crocodiles have DNA most similar to birds because they are the closest relative on the cladogram, meaning a more recent common ancestor and less evolutionary divergence.
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Primates