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?

1point the u.s. declaration of independence is structured logically to lead from premise to conclusion. which statement best completes its flow of reasoning? 1. all people are equally entitled to certain rights. ii. our rights have been violated by the british government. iii. ? o a. americans agree that king george iii is a tyrannical ruler. o b. americans must form their own government to protect their rights. o c. these rights are natural and god-given to all men equally. o d. no one can argue with the list of violations presented herein.