Question

according to the cladogram, which organisms are in the smallest clade with birds?
sharks ray - finned fish amphibians primates rodents and rabbits crocodiles birds
vertebrae
bony skeleton
four limbs
amniotic egg
hair
eggs with shell
crocodiles
primates
rodents and rabbits
sharks

Explanation:

A clade is a group of organisms sharing a common ancestor. The smallest clade with birds includes the closest related organism. On the cladogram, birds and crocodiles share the most recent common ancestor (indicated by the "Eggs with shell" trait node, which is their shared derived character). Other options (primates, rodents/rabbits, sharks) are more distantly related.

Answer:

A. crocodiles