jenaycasmall
16.10.2020 •
Biology
PLEASE HELP?!! WILL MARK
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Answers on questions: Biology
- B Biology Bacteria that contain recombinant plasmids can be easily isolated because: select one: a. they are designed to be resistant to certain antibiotics b. their colonies will be distinguished...
- B Biology Which type(s) of respiration use glycolysis, the krebs cycle and electron transport?...
- B Biology In which process do some macromolecules get assembled from smaller components and other macromolecules get degraded to yield energy?...
- B Biology Bowhunters should avoid shots, because the vital areas are protected by bone from this angle. a. quartering-away b. quartering-toward c. broadside d. rear-end...
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- B Biology The male and female reproductive organs are also known as...
- B Biology By which process do human liver cells regenerate themselves cells...
- B Biology What happens when there is an error with the cell cycle?...
- B Biology Why do offsprings produced by sexual reproduction show variation from their parents...
- B Biology From what are chemical sedimentary rocks formed a) chemicals weathered together b) chemicals dissolved in water c) chemicals cemented together d) chemicals compacted under water...
Ответ:
You just posted his one? Credit to: Vermont Legislative Research Shop
Explanation:
If you need extra resources: Lawn and garden chemicals, such as fertilizers enter the groundwater in two ways. In the first method, the chemicals can enter the groundwater by rainwater into a stream as runoff. This is especially problematic in urban environments where hard-surfaced roads allow rainwater to move over them without benefit of soil acting as a filter (Rosen and White, 1999). The water in streams replenishes groundwater, so the chemicals are absorbed into the groundwater as well. The second method of contamination is through leaching, which is the downward movement of a substance through the soil. The fertilizer may also dissolve into the surface water, which recharges the groundwater (Virginia Cooperative Extension, 1996). Nitrate is highly soluble and readily leaches into groundwater. Water with over 10 parts per million nitrate-nitrogen can cause methemoglobinemia, an inability to use oxygen in infants. The nutrient phosphorus harms clear, free water by creating algal blooms. This process, known as eutrophication, turns the water green, clouds the water, causes odor problems, and depletes the oxygen for fish and other species, effectively suffocating them (Lake Champlain Basin, 1998). To ensure that the groundwater does not get so contaminated as to be unhealthy, in 1986 the Department of Food and Markets implemented the Pesticide Monitoring Program. The goal of this program is to test wells in agricultural areas to help farmers learn about practices that prevent pesticides from leaching into the groundwater, and to conserve the nutrients in fertilizers and manure in the soil. This program is funded by fees taken from companies that sell pesticides and fertilizers in Vermont (Vermont Department of Agriculture, Food and Markets, 1998).
Ответ:
D
Explanation:
Variation in populations of any organism allows some to better survive in adverse conditions. With the application of antibiotics, the weakest individuals are killed off, the strongest to survive. Those bacteria are then able to reproduce. This is why it is essential to complete the full course of antibiotics as prescribed by your doctor, making sure to kill the stronger survivors.