What fossil evidence best supports the classification of animals into these two basic branches, still recognized today?
a) fossilized amniotic eggs
b) impressions of scales versus fur
c) evidence of exoskeletons and endoskeletons
d) fossilized bones with and without air cavities

Facilitates growth and change in neurons and the migration of neurons to different sites in the brain

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.

Identify two examples of chemical reactions that you have encountered during the last week. identify an exothermic and endothermic reaction. explain.