60. They resemble life-forms that exist today because they are the most recent forms of life, they are the most close ancestors of the modern forms of life while the other died millions of years ago. 61. [by guessing] Scientists conclude that in the past, life-forms died due to changing environments while the organisms with adaptations survived and are relatively still present, although they've evolved.
Slavery wasn't necessarily inborn or permanent, freedom people could become slaves, manumission was possible (freedom ), slaves is not always inferior.
