While the study found unexpected cognitive abilities in the lizards, an expert on bird intelligence, Louis Lefebvre with McGill University, says that the study doesn't necessarily mean lizards are smarter than birds since birds still have larger body-to-brain ratios than reptiles.
Elephantidae, Cetaceans and Primate, because elephants , cetaceans and primates, represent the most complex ones.
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Answer:
evolotion
Explanation:
In the brainstem the reticular formation in crocodiles is more complex than in the other reptiles but less complex than in birds
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