The fossil record helps scientists identify a single species from which other organisms have descended. Which is used to refer to this single species?

parent organism
fossils
descendant
common ancestor

Bonus question: according to wikipedia, in chinese philosophy yin and yang "describes how seemingly opposite or contrary forces may actually be complementary, interconnected, and interdependent." what are some examples from the story that amy tan may have intentionally incorporated elements of yin and yang philosophy into this story? select 2.

Which common characteristic of renaissance buildings does this image show

Based on this map, what can be concluded about the inca empire? (4 points) it was in a highlands region. it was in a mountainous region. it was in the amazon basin. it was in north america.