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?

How does the poem "the lady of shalott" by alfred, lord tennyson convey the position of victorian women? a curse is on her if she stay to look down to camelot. she knows not what the curse may be, and so she weaveth steadily, and little other care hath she, the lady of shalott. and moving thro' a mirror clear that hangs before her all the year, shadows of the world appear. there she sees the highway near winding down to camelot: there the river eddy whirls, and there the surly village churls, and the red cloaks of market girls, pass onward from shalott. a. most victorian women were restricted to their homes. b. victorian women were confined to domestic duties. c. most victorian women worked hard but were often bored. d. victorian women employed themselves by weaving.