What are the differences between the geocentric model of the solar system and the heliocentric model of the solar system? When were these two models used and why did they change from one to the other?

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million

Which of the following is most likely the result of an organism having lipids in its body a) water cannot be absorbed through the surface of a leaf b)human eats fruits to get a quick source of energy c) a sheep sleeps for more hours in the winter d) a warm river is filled with fish and algae