(1) how do the kidneys clean the blood? . a) by breaking down nutrients. b) kidneys clean the blood by filtering it to remove wastes. c) by absorbing nutrients. d) by destroying microbes and preventing preventing infection. (2) what role does skin play in the excretory system? . a) secretes excess water as sweat. b) protects against pathogens. c) absorbs water through osmosis. d) facilitates gas exchange

The correct answer for this question is: "B) kidneys clean the blood by filtering it to remove wastes." Kidneys clean the blood by filtering it and removing the waste.

The correct answer for this question is: "A) secretes excess water as sweat." The role of the skin in the excretory system is to secrete waste and excess water as sweat.

Dna overload will accrue

The scientific method is a series of steps followed by scientific investigators to answer specific questions about the natural world. it involves making observations, formulating a hypothesis, and conducting scientific experiments.the steps of the scientific method are •observation-the first step of the scientific method involves making an observation about something that interests you•question-once you've made your observation, you must formulate a question about what you have observed. •hypothesis-once you've made your observation, you must formulate a question about what you have observed. •experiment-once you've developed a hypothesis, you must design and conduct an experiment that will test it.•results-the results are where you report what happened in the experiment. •conclusion-the final step of the scientific method is developing a conclusion.i hope that this you : )