Tertiary consumers are always the final step in a food chain.
TRUE
FALSE

Which of the follow describes a disadvantage secondary sources have compared to primary sources?

Compare the shapes of the bones of the human skull with the shapes of the bones of the human leg. how do the shapes differ? why are the shapes important?

Ruby is conducting an investigation. an advantage of her design is that she can use a large range of variables, with that she can not be sure that one variable is the cause of another. what kind of investigation is ruby most likely conducting?