They show evidence of other life beyond us, when we see fossils they give is info that can determine other scientific data that is important for human life
Chordates are animals that possess certain characteristics including a notochord. Humans fall into this category along with many vertebrates such as whales, falcons etc; therefore, all of the answers apply.
Food, research, therapy, entertainment affection.
I believe it's the ovule.
Protista organisms are most closely related to Archaebacteria.
Small leaves duh and I know because I study it