Chordates include many species, and humans are also chordates!
some adaptations that both humans (and other chordates) and plants needed to do to live on land were:
-protect the offspring from the environment (before the offspring could be just released into water) for example by covering seeds by shells
-evolve pores in the skin for gas and other substance exchange
-protection from drying up -a better outside layer, such as the skin!
