Regents Living Environment Test Preparation Practice

    Regents Test, Full Exam Practice Online: living environment June 2019

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    Base your answers to questions 34 and 35 on the data table below and on your knowledge of biology. The table below indicates the amount of oxygen present at various water temperatures in a pond.

    ecology, organization of ecosystems  fig: lenv62019-examw_g17.png

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    Base your answers to questions 36 and 37 on the diagram below and on your knowledge of biology. The diagram represents a food web illustrating some relationships in a tidal marsh ecosystem.

    ecology, energy flow and food web fig: lenv62019-examw_g19.png

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    Base your answers to questions 38 and 39 on the information below and on your knowledge of biology.

    Mercury is a toxic chemical that accumulates in the tissues of animals in a food chain. The chart below shows mercury levels found in various commercial fish and shellfish.

    ecology, relationships among organisms fig: lenv62019-examw_g21.png

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    Base your answers to questions 42 and 43 on the information below and on your knowledge of biology.

    Bird Flu

    Researchers are not sure when the H7N9 virus, referred to as bird flu, hit the China poultry markets. In February of 2012, the virus was found to have spread from birds to humans. All cases resulted from direct contact with infected poultry.

    The bird flu can cause severe respiratory illness in humans. Since flu viruses constantly mutate, it would be difficult to develop a vaccine ahead of time. Scientists are worried that the virus could spread easily among people, causing a worldwide outbreak of the disease.

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

    As part of an experiment, a bacterial culture was grown in a lab for two days. No additional nutrients were added to the culture after the initial set-up. As the bacteria reproduced asexually, the population of the culture was measured every six hours. Some of the data related to the bacterial growth are shown in the data table below.

    scientific inquiry, data organization, plot and interpretation fig: lenv62019-examw_g22.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 diagram below and on your knowledge of biology. The diagram represents a biological process.

    Fossil evidence has demonstrated that birds evolved from a group of small carnivorous dinosaurs. Scientists have hypothesized that some evolved into birds as they filled available niches.

    evolution, new species formation and evolution fig: lenv62019-examw_g24.png

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    Base your answers to questions 50 through 52 on the diagram below and on your knowledge of biology. The diagram indicates some parts of the human female reproductive system.

    reproduction and development, human female reproductive system fig: lenv62019-examw_g25.png

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    Base your answers to questions 53 through 55 on the information below and on your knowledge of biology. The diagram represents an ecological process that occurs in New York State over a long period of time.

    ecology, succession, change of ecosystems over time fig: lenv62019-examw_g26.png

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

    Turtle Cells and Human Skin

    New research has demonstrated that turtles and humans may have had a common ancestor 310 million years ago. A recent study looked at the genes responsible for the skin layers of turtle shells compared to the genes for human skin. The findings of the study suggest that about 250 million years ago, when turtle evolution split from other reptiles, a mutation in a specific group of genes occurred. The basic organization of this group of genes is similar in turtles and humans, and they produce the important skin proteins that produce shells in turtles and protect against infection in the skin of humans.

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    Base your answers to questions 58 through 60 on the illustration and information below and on your knowledge of biology.

    evolution, naturel selection fig: lenv62019-examw_g27.png

    The illustration is of a species commonly called the little brown bat. It has 38 teeth and usually lives near bodies of water. The animal is considered beneficial by many people because it eats mosquitoes and many types of garden pests. They feed at night, detecting their prey by echolocation—a form of sonar similar to what is used on ships. They can determine the location and size of their prey by listening to the return echo.

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    Base your answers to questions 61 through 64 on the information below and on your knowledge of biology.

    Kaolin as a Spray to Control a Bean Pest

    Spraying kaolin, a clay-like material, on the leaves of plants has been effective in reducing insect damage to plants that grow in temperate regions, but has not been tried in tropical areas.

    Researchers in the tropical Andean region of South America have recently conducted experiments to see if kaolin can be used there to control the greenhouse whitefly, a significant pest of the region’s bean crops.

    In the study, four groups of bean plants were used with the following treatments:

    labs, lab, appendix A, laboratory check list fig: lenv62019-examw_g28.png

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    Base your answers to questions 65 through 68 on the passage below and on your knowledge of biology.

    Medical Mystery

    Recently, an elderly man went to a hospital. He felt tired and was coughing and dehydrated. At first, the doctor thought he had pneumonia, but an x ray showed a spot on his lung. Because the man was a smoker, the doctor expected to find a tumor.

    Instead, the surgeon discovered a pea seed growing inside the man’s lung. When the pea seedling was removed, the patient quickly regained his health.

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    Base your answers to questions 69 and 70 on the information below and on your knowledge of biology.

    organization and patterns in Life, Enzymes, hormones, receptor, and antibodies fig: lenv62019-examw_g29.png

    Arabidopsis plants respond to drought conditions by producing a stress hormone called ABA. This hormone slows down plant growth and leads to a decrease in the plant’s use of water.

    ABA binds to specific receptors in the plant that cause the guard cells on the leaf surfaces to close the stomatal openings through which water vapor can normally pass. This reduces water loss during the drought conditions.

    Although it has been suggested that spraying plants with ABA during a drought could be beneficial, it is not practical. The chemical is expensive to produce and quickly loses its ability to bind to cell receptors in the plant cells.

    Recently, however, scientists have found a way to modify the ABA receptors in Arabidopsis plants so they can be activated by another chemical that is both stable and inexpensive.

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

    Atmospheric Carbon Dioxide

    Records from polar ice cores show that the natural range of atmospheric carbon dioxide (CO2) over the past 800,000 years was 170 to 300 parts per million (ppm) by volume. In the early 20th century, scientists began to suspect that CO2 in the atmosphere might be increasing beyond this range due to human activities, but there were no clear measurements of this trend. In 1958, Charles David Keeling began measuring atmospheric CO2 at the Mauna Loa observatory on the big island of Hawaii.

    scientific inquiry, data organization, plot and interpretation fig: lenv62019-examw_g30.png

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    Base your answer to question 76 on the Universal Genetic Code Chart below and on your knowledge of biology.

    labs, lab, relationships and biodiversity fig: lenv62019-examw_g31.png

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    Base your answers to questions 80 through 82 on the information below and on your knowledge of biology. The diagram represents some of the various types of giant tortoises that live on the Galapagos Islands. The chart provides information about some individual island environments.

    labs, lab, the beaks of finches fig: lenv62019-examw_g33.png

    labs, lab, the beaks of finches fig: lenv62019-examw_g34.png

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    Base your answers to questions 84 and 85 on the diagram below and on your knowledge of biology.

    labs, lab, the beaks of finches fig: lenv62019-examw_g35.png

    Source: Galapagos: A Natural History Guide

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