The existence of comets provides possible evidence for . an ancient solar system
a young solar system
solar origin of comets

This should be easy answer quick pleassse

Ablastocyst is a group of cells that forms after a human egg is fertilized. the blastocyst consists of two types of cells. some of these cells will become the placenta. what do the other cells develop into?

Select all that apply. why are common names not a good reference to a species? common names can be in different languages common names vary with location common names vary with culture common names vary with species color

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer