50-years ago Pesticide A killed most mosquito populations in San Antonio. Today, Pesticide A does not work very well, and people have turned to Pesticide B for mosquito control. What might have caused this pattern?

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

Which best describes a gene? a. a sister chromatid b. a chromosome c. a tetrad d. a piece of a chromosome

Which ocean is on the eastern coast of north and south america? arctic ocean indian ocean pacific ocean atlantic ocean