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Living Environment - New York Regents June 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 Which statement best describes one of the
  stages represented in the diagram below?

(1) The mature forest will most likely be stable
    over a long period of time.
(2) If all the weeds and grasses are destroyed,
    the number of carnivores will increase.
(3) As the population of the shrubs increases, it
    will be held in check by the mature forest
    community.
(4) The young forest community will invade and
    take over the mature forest community.

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  Half-n-half Clue
 

2.

2 Which organ system in humans is most directly
  involved in the transport of oxygen?
  (1) digestive             (3) excretory
  (2) nervous               (4) circulatory

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  Half-n-half Clue
 

3.

3 Which cell structure contains information needed
  for protein synthesis?

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4.

4 The human liver contains many specialized cells
  that secrete bile. Only these cells produce bile
  because
  (1) different cells use different parts of the
      genetic information they contain
  (2) cells can eliminate the genetic codes that
      they do not need
  (3) all other cells in the body lack the genes
      needed for the production of bile
  (4) these cells mutated during embryonic
      development

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  Half-n-half Clue
 

5.

5 Although identical twins inherit exact copies of
  the same genes, the twins may look and act
  differently from each other because
  (1) a mutation took place in the gametes that
      produced the twins
  (2) the expression of genes may be modified by
      environmental factors
  (3) the expression of genes may be different in
      males and females
  (4) a mutation took place in the zygote that
      produced the twins

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6.

6 Which hormone does not directly regulate
  human reproductive cycles?
  (1) testosterone        (3) insulin
  (2) estrogen            (4) progesterone

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  Half-n-half Clue
 

7.

7 Owls periodically expel a mass of undigested
  material known as a pellet. A student obtained
  several owl pellets from the same location and
  examined the animal remains in the pellets. He
  then recorded the number of different prey
  animal remains in the pellets. The student was
  most likely studying the
  (1) evolution of the owl
  (2) social structure of the local owl population
  (3) role of the owl in the local ecosystem
  (4) life cycle of the owl

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  Half-n-half Clue
 

8.

8 Which sequence best represents the relationship between DNA and the traits of an organism?

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  Half-n-half Clue
 

9.

9 A sequence of events associated with ecosystem stability is represented below.
             sexual reproduction → genetic variation → biodiversity → ecosystem stability
 The arrows in this sequence should be read as
 (1) leads to                                               (3) prevents
 (2) reduces                                                (4) simplifies

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  Half-n-half Clue
 

10.

10 In some people, the lack of a particular enzyme causes a disease. Scientists are attempting to use bacteria
   to produce this enzyme for the treatment of people with the disease. Which row in the chart below best
   describes the sequence of steps the scientists would most likely follow?

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11.

11 What will most likely occur as a result of changes
   in the frequency of a gene in a particular
   population?
   (1) ecological succession
   (2) biological evolution
   (3) global warming
   (4) resource depletion

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  Half-n-half Clue
 

12.

12 The puppies shown in the photograph below are
   all from the same litter.

The differences seen within this group of
puppies are most likely due to
(1) overproduction and selective breeding
(2) mutations and elimination of genes
(3) evolution and asexual reproduction
(4) sorting and recombination of genes

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  Half-n-half Clue
 

13.

13 Carbon dioxide makes up less than 1 percent of
   Earth’s atmosphere, and oxygen makes up about
   20 percent. These percentages are maintained
   most directly by
   (1) respiration and photosynthesis
   (2) the ozone shield
   (3) synthesis and digestion
   (4) energy recycling in ecosystems

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  Half-n-half Clue
 

14.

14 Which sequence represents the order of some
   events in human development?
   (1) zygote → sperm → tissues → egg
   (2) fetus → tissues → zygote → egg
   (3) zygote → tissues → organs → fetus
   (4) sperm → zygote → organs → tissues

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  Half-n-half Clue
 

15.

15 A variety of plant produces small white fruit. A
   stem was removed from this organism and planted
   in a garden. If this stem grows into a new plant,
   it would most likely produce
   (1) large red fruit, only
   (2) large pink fruit, only
   (3) small white fruit, only
   (4) small red and small white fruit on the same
       plant

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  Half-n-half Clue
 
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