Regents Living Environment Test Preparation Practice

    Regents Test, Full Exam Practice Online: living environment June 2013

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    Base your answers to questions 32 through 34 on the diagram below and on your knowledge of biology. The diagram represents a food web in an ecosystem.

    ecology, relationships among organisms fig: lenv62013-examw_g11.png

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    Base your answers to questions 38 through 41 on the information below and on your knowledge of biology.

    The Galapagos pink land iguana, Conolophus marthae (C. marthae), is native to only one of the Galapagos Islands. Its entire range is currently limited to Wolf Volcano on Isabella Island. The iguana was first discovered on this island in 1986. Genetic studies of the animal began sometime later, and it was identified as a species separate from other iguana populations on the Galapagos in 2009. Its population might have been as high as 100 in 1986, but now there might be as few as 10 of the animals left alive.

    Other evidence indicates that this species could have diverged from another line of iguanas about 5.7 million years ago. After that, the other line of iguanas diverged into two other species, C. pallidus and C. subcristatus.

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    Base your answers to questions 44 through 47 on the data table below and on your knowledge of biology. The data table shows the number of breeding pairs of bald eagles in New York State from 1991 to 2003.

    scientific inquiry, data organization, plot and interpretation fig: lenv62013-examw_g24.png

    Directions: Using the information in the data table, construct a line graph on the grid below, following the directions below.

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    Base your answers to questions 48 and 49 on the graph below and on your knowledge of biology. The graph shows the size of a population over time.

    ecology, materials cycle through ecosystems fig: lenv62013-examw_g26.png

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    Base your answers to questions 50 through 52 on the information and graph below and on your knowledge of biology.

    A student conducts an experiment to determine how the amount of light affects the rate of oxygen production in a plant. The graph represents the rate of oxygen produced for one trial, X, in the experiment. By the end of the experiment, the plant had not reached maximum oxygen production.

    scientific inquiry, access result and draw conclusion fig: lenv62013-examw_g28.png

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    Base your answer to question 53 on the information below and on your knowledge of biology.

    Botulinum toxin is a protein produced by the bacterium Clostridium botulinum. It causes a serious form of food poisoning in humans. In a very dilute form, it is also commonly used to eliminate some signs of aging, such as wrinkles. It does this by preventing nerves from releasing a chemical messenger called acetylcholine into the synapse (space between a nerve cell and a muscle cell). The toxin affects the process that causes the muscle cell to contract and form wrinkles.

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    Base your answers to questions 54 and 55 on the scatter-plot graph below and on your knowledge of biology. The graph shows changes in the percentage of vancomycin-resistant bacteria in a population between the years 1983 and 2001.

    evolution, naturel selection fig: lenv62013-examw_g30.png

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    Base your answer to question 57-60 on the information below and on your knowledge of biology.

    The year 2010 was declared the International Year of Biodiversity. However, significant loss of biodiversity is still occurring. Researchers around the world are working on a variety of ways to protect natural resources. According to an article in Science News, March 13, 2010, “reversing the downward spiral of biodiversity will take more than protecting wild places, but that’s where scientists are starting.”

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    Base your answer to question 61-64 on the information below and on your knowledge of biology.

    Scientists have been experimenting with different forms of alternate energy to help reduce the amount of fossil fuels that are burned. They studied yeast, which convert plant materials into ethanol, a form of alcohol that can be used in automobiles. These experi- ments were carried out at room temperature. The scientists wondered whether more ethanol would be produced at different temperatures.

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    Base your answers to questions 65 and 66 on the passage below and on your knowledge of biology.

    Smoking is Dumb

    A study by Prof. Mark Weiner of Tel Aviv University’s Department of Psychiatry and the Sheba Medical Center of Tel Hashomer Hospital has determined that young men who smoke are likely to have lower IQs than their nonsmoking peers. Tracking 18- to 21-year- old men enlisted in the Israeli army in the largest study of its kind, he has been able to demonstrate an important connection between the number of cigarettes young males smoke and their IQ.

    The average IQ for a nonsmoker was about 101, while the smokers’ average was more than seven IQ points lower at about 94, the study determined. The IQs of young men who smoked more than a pack a day were lower still, at about 90. An IQ score in a healthy population of such young men, with no mental disorders, falls within the range of 84 to 116.

    Source: Science Daily April 2, 2010

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    Base your answers to questions 67 through 70 on the information below and on your knowledge of biology.

    The rapidly growing biofuel industry converts resources such as corn plants, vegetable oils, and industrial wastes into products that can be used to power cars and trucks, and heat homes. The increased demand for fossil fuel has led to the construction of factories to pro- duce biofuels. A proposal has been made to build a biofuel factory near Syracuse in New York State.

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    Base your answers to questions 71 and 72 on the information and diagram below and on your knowledge of biology.

    Endometriosis is a condition that occurs in some women, causing multiple cells or layers of cells to grow outside of the uterus. In some cases, these growths can actually cover the entire ovary or cause the tube leading from the ovary to the uterus to be blocked. The diagram below represents the female reproductive system. Two structures, A and B, are labeled.

    reproduction and development, human female reproductive system fig: lenv62013-examw_g31.png

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    Base your answers to questions 73 and 74 on the information below and on your knowledge of biology.

    A student observes a red onion cell with a compound light microscope using low, then high power. The two views are represented below.

    labs, lab, diffusion through a membrane fig: lenv62013-examw_g33.png

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    Base your answers to questions 77 and 78 on the DNA base sequence below and on your knowledge of biology.

    AAC–GCC–GTC–CGC–TAG

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    Base your answers to questions 79 and 80 on the diagram below and on your knowledge of biology. The diagram represents a cell and its changes as a result of two laboratory procedures, A and B.

    labs, lab, diffusion through a membrane fig: lenv62013-examw_g34.png

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    Base your answers to questions 81 through 83 on the information and diagram below and on your knowledge of biology.

    The circled areas in the diagram represent bird species that are in the same genus, a classification group that includes closely related species. These birds are found on the Hawaiian Islands.

    labs, lab, the beaks of finches fig: lenv62013-examw_g35.png

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