How do plants respond to different environmental stimuli?

Look at the following answer choices and determine which belongs in the both category. testable, can be disproven explains natural phenomena, has evidence to support it prediction, tentative, one or more scientists working together well established, many different scientists working independently, highly reliable

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

The pronunciation aid that determines the stress placed upon a syllable is the