Acertain species of pine tree survives only in scattered locations at elevations above 2800 meters in the western united states. to understand why this tree grows only in these specific places, an ecologist should

What came first egg or chicken? and is tomato a vegetable or a fruit?

Aboy with an extra x chromosome probably has which of the following syndromes?

Group control group #1 experimental group yes yes yes control group #2 no new drug orange juice bed rest no yes no yes ves which of the following is the best explanation of why a second control group was included in this experiment? o a. to provide the volunteers in the study with something to drink o b. to prove that the common cold cannot be cured c. to confuse anyone who is trying to steal their new drug and sell it as their own invention o d. to researchers conclude that results are related to the new drug and not to the orange juice submit e previous