The oxygen level of a lake suddenly starts decreasing. A biologist believes that photosynthetic organisms in the community have become less efficient at producing oxygen. A geologist believes that changes in the ground have increased the inflow of water into the lake. Why are both of these options valid scientific hypotheses

What is point source pollution of an aquatic ecosystem? a) pollution of freshwater sources b) pollution from many sources that combine into one c) pollution that occurs over a wide area; water that runs off from fields, parking lots, and other land surfaces d) pollution that can easily be identified with a single discharge source, such as an open pipe which drains into a body of water

11. a nursing assistant works in a home healthcare setting with a patient. during a procedure, a blood spill occurs. the nursing assistant put on her ppe and gets some paper towels. she removes the visible blood by blotting it up with the paper towels. next, she should place the paper towels in the trash. wash her hands using proper technique get a disposable mop. place the paper towels in a biohazard bag

The table below describes geological events. event boundary where they occur convergent divergent transform a yes no no b yes yes no which statement is most likely correct? answers: 1). event a represents earthquakes and event b represents the formation of ocean basins. 2.) event a represents the formation of ocean basins and event b represents earthquakes. 3.) event a represents volcanic eruption and event b represents the creation of mountain ranges. 4.) event a represents the creation of mountain ranges and event b represents volcanic eruption.