The transfer of energy as electromagnetic waves is called radiation. Not all electromagnetic waves emit the same radiation. What determines
the radiation that an electromagnetic wave emits?

The large ground finch obtains food by cracking seeds. what is its short, strong beak an example? a) tendency toward perfection b) adaptation of a species over time c) selective use and disuse of an organ over time d) scarcity of recourses

What is thought to have caused the mass extinction at the end of the cretaceous period?

How do living things obtain phosphorus