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Living Environment - New York Regents August 2009 Exam

   Directions (1–30): For each statement or question, write on your separate answer sheet the number of the
word or expression that, of those given, best completes the statement or answers the question.

Formats View Examination Paper with Answers Solve Examination Paper Questions Review
: Multiple choice

Your Performance  

1.

1 Organisms that are able to manufacture organic
  nutrients from substances in the abiotic environment
  are classified as
  (1) heterotrophs            (3) predators
  (2) fungi                   (4) autotrophs

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2.

2 Which factor would have the greatest effect on
  the flow of energy into an ecosystem?
  (1) a large decrease in the amount of sunlight
      available
  (2) a large increase in the number of carnivores
  (3) a small increase in the number of decomposers
  (4) a small decrease in the amount of minerals
      available

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3.

3 Which structures carry out life functions within
  cells?
  (1) tissues             (3) organelles
  (2) organ systems       (4) organs

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4.

4 Which process is most directly responsible for
  maintaining internal stability in an organism
  when its environment is constantly changing?
  (1) digestion            (3) reproduction
  (2) feedback             (4) evolution

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5.

5 The function of a cell depends primarily on its
  (1) life span             (3) structure
  (2) color                 (4) movement

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6.

6 In some cases, humans have chosen to mate
  certain individual farm animals within a species.
  For example, by allowing only the largest cattle
  to reproduce over many generations, strains of
  very large cattle have been produced. This
  process is known as
  (1) natural selection
  (2) direct harvesting
  (3) selective breeding
  (4) dynamic equilibrium

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7.

7 A boy inherits genes for tallness, but his growth
  is limited as a result of poor nutrition. This is an
  example of
  (1) an inherited disorder
  (2) environmental influence on gene expression
  (3) expression of a hidden trait
  (4) a characteristic controlled by more than one
       pair of genes

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8.

8 The sickle-cell trait is an inherited condition
  resulting from the presence of abnormal
  molecules of the protein hemoglobin in red
  blood cells. A person with the sickle-cell trait
  may have a child with the same condition
  because the child receives from the parent
  (1) abnormal red blood cells
  (2) abnormal hemoglobin molecules
  (3) a code for the production of abnormal hemoglobin
  (4) a code for the production of abnormal amino
      acids

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9.

9 The sorting and recombining of genes during
  meiosis and fertilization usually leads to the
  production of
  (1) gametes with many copies of the same
      chromosome
  (2) embryos with traits identical to those of all
      other members of the species
  (3) zygotes with the genetic information to
      produce only females
  (4) offspring with some traits that did not appear
      in their parents

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10.

10 Which situation would most likely produce a
   gene mutation in a squirrel?
   (1) The squirrel stops using its claws for digging.
   (2) The squirrel is exposed to radiation for
       several days.
   (3) Oak trees gradually become less common.
   (4) The weather becomes wetter for a short
       period of time.

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11.

11 Which row in the chart below best describes what happens when some DNA bases are deleted from a
   gene?

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12.

12 The diagram below represents a technique currently used by scientists in the field of biotechnology.

Which statement describes a possible outcome of this technique?
(1) The bacterium is able to produce a human hormone.
(2) It allows the bacterium to grow in humans, since it contains a human gene.
(3) It allows humans to become immune to an infection from this type of bacteria.
(4) The bacterium can now produce human cells identical to cells of the DNA donor.

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13.

13 When antibiotics were first developed, most
   infectious diseases could be controlled by them.
   Today, certain bacteria are resistant to many
   antibiotics. One possible explanation for this
   change is that
   (1) the antibiotics killed most of the bacteria that
       did not have a genetic variation for resistance
   (2) the bacteria needed to change in order to
       produce more antibiotics
   (3) some of the bacteria learned how to resist
       the antibiotics
   (4) antibiotics have become weaker over the
       years

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14.

14 Thousands of genetically identical trees have
   been discovered growing in a remote, undisturbed mountain area in Colorado. These trees
   are most likely the result of
   (1) genetic engineering
   (2) asexual reproduction
   (3) meiotic cell division
   (4) biotechnology

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15.

15 The ability of the human body to keep bloodsugar levels within a fairly narrow range, despite
   the intake of meals high in carbohydrates, is an
   example of
   (1) active transport
   (2) genetic recombination
   (3) homeostasis
   (4) digestion

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