Master Advanced Placement (AP) with Fun Quizzes & Brain Teasers!

What is the altitude of the north celestial pole for an observer located on the earth's equator?a) 45 degreesb)270 degreesc) 0 degreesIT IS NOT 90 degrees cause I got that wrong -_-
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Why are incentives preferred over regulations, when possible?
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friedrich hayek economics
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which of the following represents naturalistic observation?
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What is a source? A. A primary work that is used to find information about a particular topic B. The place where a writer credits the original author C. A notation from the author at the end of the work D. The search engine a writer uses to explore a topic
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What color is the sky?
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Define the concept risky behavior
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I really need help. The answer apparently is not k
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47. The binding of erythropoietin to theerythropoietin receptor (EpoR) stimulatesintracellular signaling in certain cells, whichcauses them to differentiate to red blood cells.The EpoR is a transmembrane protein with twocytoplasmic domains, each of which is bound bya kinase protein, JAK2. The binding oferythropoietin to the EpoR causes thecytoplasmic domains of the EpoR to undergoconformational changes that activate the boundJAK2 kinases. The JAK2 kinases thenphosphorylate several intracellular proteins,including STATS, whose resulting activitycauses the cells to differentiate to red bloodcells.Which of the following explains how a mutationthat removes a portion of each cytoplasmicdomain of EpoR most likely affectsdifferentiation of the cells?(A) The cells will differentiate more rapidlythan they typically do because the JAK2kinases will always be active.(B) The cells will mature to another cell typebecause the JAK2 kinases willphosphorylate inappropriate cellularproteins.(C) STATS will not be activated becauseerythropoietin cannot bind to the EpoR.(D) STATS will not be activated because it willnot be phosphorylated by the JAK2kinases.
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How would you describe the racial and ethnic climate in your community? (Provide specific examples supporting your argument.)If relations are poor, what could be done to improve them? If relations are good, what causes this positive environment?
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(HELPPPP 50 POINT ASAP NEED HELP) Compare your finished model of the solar system to the predictions you originally made about the planets comparative sizes and distances. In what ways were your original predictions about the scale of the solar system correct or incorrect? How has your understanding of the scale of the solar system changed?-EARTH SCIENCE
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Why is self-reflection critical for developing a sociocultural consciousness?
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The Jenkins family and the Moore family each used their sprinklers last summer. The water output rate for the Jenkins family's sprinkler was per hour. The water output rate for the Moore family's sprinkler was per hour. The families used their sprinklers for a combined total of hours, resulting in a total water output of . How long was each sprinkler used?
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Length of college writting pages
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How does keeping the end in mind keep you motivated when you are overwhelmed
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This is one hallmark of children's egocentrism.
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I need help with my work
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I need help with my work
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(QUICKKK 50 POINT HELP ASAP PLEASE) Summarize your second NASA spinoff technology in the answer space. -EARTH SCIENCE
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(HELP 50 POINTS NEED HELP ASAP PLEASE) Summarize the third NASA spinoff technology in the answer space.- Earth Science
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Asmartphone manufacturer asks its designers to investigate how their products can better support visually impaired usersWhich economic question are they focusing on
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If all chlorine and bromine from human sources were eliminated from the stratosphere, which statement would be correct?Chlorine and bromine would be zero.Chlorine would be less abundant than bromine.Current total chlorine would decrease by half.Bromine would be less abundant than chlorine.
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How can an invasive species cause native species to become threatened or endangered?Invasives are much larger than natives, so they use more space than native species.Invasives can better adapt to environmental changes, so they have fewer selective pressures.Invasives are often better competitors, so native species struggle to find resources.Invasives often live longer, so native species fail to reproduce as often.
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Both nonpoint source pollution and point source pollution can impact water quality in streams, rivers, and lakes. Despite significant improvements to water quality from implementation of Clean Water Act regulations, many waters across the United States do not meet water quality standards. What is the most likely cause for the continued impairment of water quality?Much of the pollution today is from pollutants being exposed to rainwater, and runoff is reaching the water.The chemical industry is producing and discharging record amounts of chemicals into rivers and streams.Environmental enforcement has been reduced, and more pollution is being discharged into rivers and streams.Water quality standards have become more lenient, allowing more pollutants to be discharged into the water.
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