1. What was the main function of heptachlor? To prevent…
1. What was the main function of heptachlor? To prevent… 1. What was the main function of heptachlor? To prevent particulates from spreading through the air To prevent soil insects from eating the roots of plants To prevent rodents from eating grains kept in silos To prevent the spread of tick-borne diseases by animals 2. After washing her hands and face for a few weeks with tap water, a woman notices that she has irritations on her skin. She has a water quality test done to see what might be the cause. Which of these may have contributed to her skin irritation? Asbestos Mercury Arsenic Lead 3. Ouabain is a plant-derived poison that was traditionally used to make poison arrowhead tips for hunting. Ouabain is harmful because it inhibits the activity of sodium-potassium pumps in cell membranes. The graph shows a dose-response curve for ouabain. The response is the amount of sodium-potassium pump activity, as measured by how much ATP is used by the pumps (Na,K- ATPase activity). Separate curves are shown for three ages of rats.Which statement is supported by the data?Juvenile rats show a greater response to ouabain at lower doses, while adult rats show a greater response at higher doses.The age groups are most similar in ouabain response when sodium potassium pump activity is reduced by 30 percent. Small doses of ouabain decrease sodium pump activity, but younger rats are more resistant to oubain than older rats. Ouabain is likely an endocrine disruptor because the highest doses produce the largest reduction in sodium pump activity. 4. Painted turtles are animals that live in freshwater ecosystems. Temperature affects the sexual development of painted turtle embryos. Warm temperatures tend to produce female turtles, while cold temperatures tend to produce male turtles.A team of scientists wanted to know if exposure to bisphenol A (BPA) affected the sex development of painted turtles. BPA is a chemical commonly found in plastics. The scientists held turtle eggs at cold temperatures that would typically generate all male turtles. The eggs were divided into an experimental group and a control group. The experimental group was exposed to BPA, and the control group was not.All the turtles in both the control and experimental groups were born male. None of the turtles in the control group had any abnormalities in their gonads. However, 89 percent of the turtles born in the experimental group had female gonad tissue present in their testes. Most of the males in the experimental group also had underdeveloped structures within their testes. Which of the following conclusions about BPA is best supported by the evidence from the study? BPA exposure will likely decrease sperm production in male turtles, but the turtle population will not change. BPA exposure will likely increase sperm production in male turtles, causing the turtle population to increase. BPA exposure will likely decrease sperm production in male turtles, causing the turtle population to decrease. BPA exposure will likely increase sperm production in male turtles, but the turtle population will not change. 5. How would the diet of a mammal need to change in order to prevent the chances of accumulating POPs in its body tissues? Limit the amount of protein ingested Lower the amount of sugars eaten Increase the amount of water consumed Reduce the amount of lipids taken in 6. Water quality samples are collected from a river flowing through a rural county. The samples indicate a concentration of fecal coliform bacteria that exceeds water quality standards. What is the most likely source of this bacterial pollution? Failing septic tanks Runoff from highways Discharges from washing laundry Sediment from stream banks 7. The map shows the projected percentage of the world’s total mismanaged plastic waste in 2025 for selected countries. Study the map and consider the locations of the different countries with the highest projected percentages. Note that the top five countries by population are China, India, the United States, Indonesia, and Pakistan.Which of the following conclusions is supported by the data on the map?Image transcription textProjected share of global mismanagedplastic waste in 2025 Our World inData Projected share of gl… Show more… Show moreThe countries in the western part of the Pacific Ocean have the highest cumulative percentage. There is a correlation between the area of a country and its projected plastic waste percentage. The projected percentages are independent of the strength of any recycling programs in the country. There is a correlation between the countries with the highest waste percentages and the highest populations. 8. Imagine you want to try the fresh duck liver pate at a trendy San Francisco restaurant. With respect to selenium concentration, when would this delicacy likely be the safest to consume?Imagine you want to try the fresh duck liver pate at a trendy San Francisco restaurant. With respect to selenium concentration, when would this delicacy likely be the safest to consume?Image transcription textDry year/low flow season SIERRANEVADA San Luis Drain Seleniuminputs 141 3-5 3,433* 3 S… Show more… Show moreNever, because selenium is toxic. In the summer, after a very rainy winter and spring. In the summer, after a very dry winter and spring. At any time, because it doesn’t vary that much. 9. Selenium is a mineral that is naturally found in the environment. In low amounts, it has numerous health benefits for wildlife and humans alike. However, its concentration in the environment can be increased to dangerous levels through agricultural and industrial activities.What would likely occur if selenium inputs from the Sacramento and San Joaquin Rivers decreased to trace amounts?Image transcription textDry year/low flow season SIERRANEVADA to O San Luis Drain=Selenium inputs 3-5 3,433… Show more… Show more The concentration of selenium in clams would significantly decrease. The concentration of selenium in particulates would significantly increase. The concentration of selenium in clams would show no significant difference. The concentration of selenium in particulates would significantly decrease. 10. Examine the diagram.Of the cumulative 8.3 billion tons of plastic produced between 1950 and 2015, what percentage was recycled and is still in use?Image transcription textGlobal plastic production and its fate(1950-2015) Our World in Data Globalproduction of polymer res… Show more… Show more22 percent 12 percent 1.2 percent .012 percentScience Environmental Science BIOLOGY BIO
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