What is the most significant challenge for organisms that live in estuaries? O A. Changing nutrient levels
O B. Changing water temperatures
O C. Changing water depth
O D. Changing water salinity
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Afarmer has applied a pesticide to control a pest population that is affecting her crops. the pest population has reacted as shown below. which best describes the process that the pest population has experienced due to this environmental change? a genetic diversity b natural selection c natural resistance d genetic resistance

What must be done to breed dogs for a partical trait

The earths core is made up mainly of what 2 substances? 2. like an egg, earth has a core, a layer surrounding the core, and a thin, hard outer layer. which layers of the earth match the layers of an egg?