Biology

Biology, 01.09.2019 11:30, SmokeyRN

Where is oxygen content in a river or stream likely to be highest? a. the source b. the mouth c. the middle portion d. none of the above

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Geography, 07.07.2019 19:30, milhai0627a

Which of the following best describes the differnce between a source and a mouth? a) a source is where a river or stream originates, and a mouth is where it empites into another body of water? . b) a source is where a river or stream empties into another body of water, and a mouth is where it originates.? c) a source is partially surrounded by land, and a mouth is completely surrounded by land.? d) a source is completely surrounded by land, and a mouth is partially surrounded by land.

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Biology, 26.07.2019 14:50, morgan4411

Where is oxygen content in river or stream likely to be highest?

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Chemistry, 27.08.2019 20:00, tk1264

1: which of the following is the best example of a valid hypothesis? a. children like brand x peanut butter better than brand y peanut butter. b. if i add substance x, then it will lower the temperature at which water freezes. c. people should eat vegetables. d. bananas are better for you than chocolate. 2: kobe is testing whether 100 g of substance a, 100 g of substance b, or 100 g of substance c produces more oxygen in a chemical reaction at 25°c. what is the independent variable? a. the masses of the substances b. the temperature of the substances c. the amount of oxygen produced d. the nature of the substances 3: a chemist measures the amount of mercury in sediment samples from three areas of a river (the source, the midway point, and the mouth). which of the following is the most reasonable hypothesis for the chemist's experiment? a. if a chemical plant near the source of the river is dumping mercury, then the mercury levels should be highest at the source and lowest at the mouth. b. if a chemical plant near the source of the river is dumping mercury, then the mercury levels should be highest at the mouth and lowest at the midway point. c. if a chemical plant near the source of the river is dumping mercury, then the mercury levels should be highest at the mouth and lowest at the source. d. if a chemical plant near the source of the river is dumping mercury, then the mercury levels should be the same all along the river.

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Biology, 24.09.2019 11:30, GILLIG6003

Where is oxygen content in a river or stream likely to be highest? a. the source b. the mouth c. the middle portion d. none of the above

Answers: 2

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