help please!

The approximate age of Earth is:


6,000 years

150,000 years

4.5 billion years

13.5 billion years
2.
On Aristotle's Scala Naturae, humans were:


on the bottom rung

on the top rung

on the same rung as animals

lower than plants
3.
Which of these ideas is not a central theory for modern biology?


evolution

creationism

cell theory

gene theory