Read the observation, question, and hypothesis. Then, choose the independent variable from the list. Observation: Bread seems to turn moldy faster in summer than in winter. Question: Do hotter summer temperatures turn bread moldy faster? Hypothesis: Bread turns moldy faster at higher temperatures. The independent variable is

1. in what ways have non-native species been beneficial? 2. what are some of the hypotheses for the collapse of honeybee colonies? 3. distinguish between regional and functional extinction. 4. why is it difficult to measure background extinction rates? 5. what three factors are most important in causing extinction rates to climb?