Abiologist wants to test some lake water for the presence of nitrates. he has a sensor that detects even the tiniest amount of nitrates by turning an internal light from green to red. 1. what will be his positive control? 2.what will be his negative control ? 3.why does he need to include these control?

Read the paragraph. [1] this year, the linden high school debate team is bigger than ever. [2] neither the students nor the faculty advisor has much experience, but it’s a smart, capable, argumentative group! [3] we’ve tried to make a schedule that allows us to study, prepare, and scrimmage. [4] only one of us are able to practice on thursdays or fridays, which can be inconvenient. [5] even so, we feel prepared and excited for this year’s tournaments. [6] our first debate is on october 10th, and we are excited that it is so soon. which two sentences have subject-verb agreement errors? sentence 2 and sentence 4 sentence 2 and sentence 1 sentence 3 and sentence 5 sentence 4 and sentence 6

Which revision of this sentence best uses direct characterization?

If a text made the claim that act iv was the most important act in the entire play, what evidence could you find to prove the accuracy of that claim? list one piece of evidence from the text to support that claim.