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18st take/launch.jsp?course assessment id 176214 1&course; id 115016 1&content; id- 3085657 Question Completion Status: QUESTION 22 Which structure is correctly paired with its tissue system? o root hair vascular ti O guard cell vascular tissue o companion cell ground tissue o tracheid vascular tissue QUESTION 23 The germ layers are formed in which of the following stages? O cleavage morula o gastrula O zygote QUESTION 24 Blood reaching active muscle cells via arterioles has a??than the interstitial fluid. o higher PO2 O higher PCo2 o greater bicarbonate concentration O lower pH QUESTION 25 The large surface area in the gut directly facilitates O secretion O absorption O filtration o temperature regulation QUESTION 26 Click Save and Submit to sove and submit. Click Save All Answers to save all answers

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