DAT destroyer bio 2015

[DCG anonymous]

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#253 which has a four chamber heart?
answer is "a robin"
How can the answer not be reptiles when crocodiles have a four chamber heart as well?

 

[Dental_14]

Crocs are the only reptiles that have a 4 chambered heart, not all of them do
You wouldn't normally say that reptiles have four chambered heats, crocs are the exception

 

[RuffDay]

Here is the classic explanation to this question. All crocodiles are reptiles, but not all reptiles are crocodiles. So, most reptiles have 3 chambered hearts, but crocodilians have 4 chambered hearts.

Here are additional information for other organisms:

Amphibians have 3 chambered hearts
Turtles have 3 chambered hearts but with an incomplete wall in the single ventricle, so their hearts are functionally 4 chambered.
Birds and mammals have 4 chambered hearts.

I hope this helps!