Afamily decides that they want to produce chihuahuas with long hair. identify a procedure that could be used to make sure that the puppies all have long hair.

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

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .