You are researching the geographical range of semi-tropical tree species. You hypothesize that recent shifts in the trees' ranges are due to global climate change. What aspects would be important in supporting your hypothesis? (Select all that apply.)
A) Focusing on the one or two tree species that show the most dramatic range shift
B) Including many tree species from a variety of plant families
C) Excluding any species that have not shown a recent range shift
D) Ensuring that the ranges of the included species cover most of the earth's semi-tropical regions
E) Focusing on a single semi-tropical region in order to gather more accurate data

Question

Quizplus · Accepted Answer

In order to support the hypothesis that recent shifts in the trees' ranges are due to global climate change, it is important to include many tree species from a variety of plant families in order to strengthen the evidence. It's also important to ensure that the ranges of the included species cover most of the earth's semi-tropical regions to get a comprehensive analysis. Focusing on one or two species may not provide enough evidence, and excluding any species that have not shown a recent range shift could skew the results. Focusing on a single semi-tropical region would not provide enough data to make conclusions on a global scale.

You Are Researching the Geographical Range of Semi-Tropical Tree Species