Regents Living Environment Test Preparation Practice

    Regents Test, Full Exam Practice Online: living environment August 2015

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    Base your answers to questions 31 through 33 on the information and graph below and on your knowledge of biology.

    A population composed of tan snails and black snails inhabits the same sandy beach. A nearby volcano erupted, and black lava particles washed down to the beach. The once tan beach was now black. The graph below shows the population of tan snails and black snails before and after the volcanic eruption.

    evolution, naturel selection fig: lenv82015-exam_g4.png

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    Base your answers to questions 35 and 36 on the diagram below, which represents a metabolic process, and on your knowledge of biology.

    organization and patterns in Life, organic and inorganic compounds fig: lenv82015-exam_g7.png

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    Base your answers to questions 39 and 40 on the information below and on your knowledge of biology. The graph below shows the growth of Paramecium aurelia in the same culture dish for 14 days.

    ecology, materials cycle through ecosystems fig: lenv82015-exam_g10.png

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    Base your answers to questions 42 and 43 on the diagram below and on your knowledge of biology. The diagram represents the current percentage of each population by age and gender (male/female) for two countries.

    human influences on the environment, human influences on global stabilities of ecosystems fig: lenv82015-exam_g11.png

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    Base your answers to questions 44 through 47 on the information below and on your knowledge of biology.

    An experiment was carried out to determine the effect of exposure to UV light on the growth of bacteria. Equal quantities of bacteria were spread on 5 petri dishes containing nutrient agar. Half of each petri dish was exposed to UV light for various amounts of time, and the other half was protected from the UV light with a UV screen. After the UV treat- ment, the bacteria were grown in an incubator for 24 hours, and the number of colonies was counted. The diagram below represents the initial set up.

    scientific inquiry, data organization, plot and interpretation fig: lenv82015-exam_g12.png

    The table below contains the data collected by counting the number of bacterial colonies growing on both the screen-covered side and the unscreened side.

    scientific inquiry, data organization, plot and interpretation fig: lenv82015-exam_g13.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 information and graphs below and on your knowledge of biology. The graphs show the relative enzymatic activity of four different enzymes in acidic (below pH 7) and basic (above pH 7) environments.

    labs, lab, appendix A, laboratory check list fig: lenv82015-exam_g17.png

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    Base your answers to questions 50 and 51 on the information below and on your knowledge of biology.

    Head Start for Hellbenders

    The hellbenders (a species of large salamander) at the Bronx Zoo are now approximately seven inches in length and will grow to full size in about five years. Once they are about two-and-a-half years old, they will be returned to the wild in western New York State. Hellbender populations are declining due to several factors including over-collection for the pet trade, disease, pollution, and habitat destruction. Juvenile hellbenders in the wild currently face great difficulties in reaching adulthood, so the “head start” provided by the reintroduction of the 41 animals will help boost local populations.

    Source: Wildlife Conservation Society, Members News

    May/June 2011

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    Base your answer to question 55 on the diagram below and on your knowledge of biology. The diagram represents four types of bacteria.

    labs, lab, appendix A, laboratory check list fig: lenv82015-exam_g19.png

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    Base your answers to questions 56 and 57 on the information below and on your knowledge of biology.

    The fight-or-flight response in humans prepares the body to fight off or run away from a potential threat. This response results from a series of nerve and chemical signals that direct how cells function. This, in turn, determines the actions of organs in these situations.

    Some of the changes experienced by the individuals as part of this response include:

    increased pulse rate increased blood glucose levels increased breathing rate

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    Base your answers to questions 58 and 59 on the article below and on your knowledge of biology.

    Bats Devastated by Deadly Fungus

    The most common bat species in North America, the little brown bat, could be facing extinction because of a fungus. The fungus, called white-nose syndrome, grows on the exposed skin of bats as they hibernate in cool caves or mines. Infected bats develop lesions (sores) on their wings, which play important roles in water balance, circulation and heat reg- ulation. These lesions on a bat’s wings or on its nose cause the bat to wake up during hiber- nation. Waking up early forces the bat to use up the energy it has stored as fat for its long sleep, exhausting the animal and eventually killing it.

    In some infected caves, 90 percent to 100 percent of bats die. On average, the disease takes out 73 percent of the bat population at a given hibernation site. If infection continues at current rates, the researchers predict that the little brown bat population will drop below 0.01 percent of its current numbers by 2026.

    The loss of the little brown bat would be harmful for humans because bats eat their body weight in insects each night. Many of these bugs are agricultural pests or carriers of human disease.

    One way to decrease the spread of the disease would be for the researchers who visit infected caves to decontaminate their clothes and gear with antiseptics. It has also been sug- gested that a small number of these bats could be placed in an artificial hibernating area and medicated to protect them.

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    Base your answers to questions 61 through 63 on the information below and on your knowledge of biology.

    Chickenpox vaccine is the best way to prevent chickenpox. Vaccination not only protects vaccinated persons, it also reduces the risk for exposure in the community for persons unable to be vaccinated because of illness or other conditions, including those who may be at greater risk for severe disease. While no vaccine is 100% effective in preventing disease, the chickenpox vaccine is very effective: about 8 to 9 of every 10 people who are vaccinat- ed are completely protected from chickenpox. In addition, the vaccine almost always pre- vents against severe disease. If a vaccinated person does get chickenpox, it is usually a very mild case lasting only a few days and involving fewer skin lesions (usually less than 50), mild or no fever, and few other symptoms.

    Source: www.cdc.gov

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    Base your answer to question 64-66 on the diagram below and on your knowledge of biology. The diagram represents a food web typical of the Great Lakes area of New York State.

    ecology, relationships among organisms, ecology, stability of ecosystems, effect of organism interactions fig: lenv82015-exam_g21.png

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    Base your answers to questions 67 through 69 on the passage below and on your knowledge of biology.

    A field in New York State is mowed all summer long for a number of years. The field is sold, and the new owner decides to stop mowing. Over a number of years, the ecosystem begins to undergo ecological succession. After a series of different plant communities are present, the area eventually becomes a stable forest ecosystem.

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

    On April 20, 2010, an explosion occurred at an oil well in the Gulf of Mexico, causing millions of gallons of oil to escape into the water over the next few months. Large areas of the Gulf were covered by oil. As the oil washed ashore, many areas along the coastline that were breeding grounds for various bird species were contaminated. By November 2010, researchers along the coast and in the Gulf had collected 6104 dead birds, 609 dead turtles, and 100 dead mammals. Although the oil well had provided oil for energy for a large number of people, the oil spill had a great effect on the ecosystems in and around the Gulf of Mexico.

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    Base your answers to questions 76 and 77 on the information below and on your knowledge of biology.

    Caretakers at a zoo are trying to determine which of two male tigers fathered the newest cub. They obtained DNA from the tiger cub, the mother tiger, and the two male tigers. The DNA was analyzed. The results of the analysis are shown below.

    labs, lab, relationships and biodiversity fig: lenv82015-exam_g27.png

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    Base your answer to question 79 on the diagram below and on your knowledge of biology.

    labs, lab, the beaks of finches fig: lenv82015-exam_g28.png

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

    There are two different species of finch that live on the same small island, species A and species B. Both species successfully feed and reproduce on the island. Species A nests in pine trees and eats large seeds. Species B nests in hollowed-out dead logs and eats small insects.

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