Astudent is doing an experiment to find the concentration of ammonia, a component of fertilizer, that affects the life cycle of the aquatic worm. the amount of fertilizer in this experiment is the a) control factor b) dependent variable c) independent variable d) optimum factor e) standard variable

The roman empire fell around the 5th century, and as islam spread in the 7th century, trade between europe and china slowed. chinese traders were blocked from westward expansion into europe when the chinese army was defeated by muslim fighters in the area known as syr darya. the trade routes, known as the silk road, fell into disuse, and trade between the far east and europe nearly stopped. it wasn't until the 13th century when the mongols invaded and controlled central asia and large parts of the middle east that extensive trade along these routes was opened again. based upon the paragraph above and your knowledge of the mongols, which of the following statements is correct? a. the mongols unified regions along the silk road, allowing for safe transport of goods. b. muslims controlled busy trade routes into china from the 5th to the 7th centuries. c. without access to european markets, the chinese were unable to obtain raw materials. d. the mongols replaced the roman empire as the dominant force in western europe.

Write in detail! will give free points 30 + free ! looking at the red mustang on the left, and the blue prius on the right, explain which vehicle should be given right-of-way at this intersection.

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