New York State Chemistry RegentsNew York State Earth Science Regents

 
NYS Living Environment Regents June 2008
Living Environment Regents June 2008 Question 80 PDF Print E-mail
Thursday, 23 April 2009 11:22
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The cell looses water content since the level of water in the solution is lesser than that of the cell.

Correct Answer: Option 3
 
Living Environment Regents June 2008 Question 79 PDF Print E-mail
Thursday, 23 April 2009 11:19
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Correct Answer: Option 2
 
Living Environment Regents June 2008 Question 78 PDF Print E-mail
Thursday, 23 April 2009 11:18

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Biological membranes are not equally permeable for all substances. They are selectively permeable, i.e. the membranes can be permeated by a substance A but not by a substance B. Strictly speaking they are only permeable for some gases like oxygen, nitrogen, carbon dioxide, etc., because only these can permeate a membrane by free diffusion.

Correct Answer: Because cell membranes are selectively permeable.

 
Living Environment Regents June 2008 Question 77 PDF Print E-mail
Thursday, 23 April 2009 11:15
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Starch is often used in chemistry as an indicator for redox titrations where iodine is present. Starch forms a very dark blue-black complex, with iodine. The indicator is not affected by the presence of iodide (I-). Starch forms an unstable complex (blue colored) in low concentrations of Iodine.

Correct Answer: Turning of the dark blue-black complex with iodine.
 
Living Environment Regents June 2008 Question 76 PDF Print E-mail
Thursday, 23 April 2009 11:08
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Living Environment Regents June 2008 Question 75 PDF Print E-mail
Thursday, 23 April 2009 10:46

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AnswerCorrect : Option 2

Fruits are produced by plants; worms and insects feed on these fruits. Also fruits are the producers in a food web and worms and insects form the primary consumers. Hence, these are not competitors.

 
Living Environment Regents June 2008 Question 74 PDF Print E-mail
Thursday, 23 April 2009 10:37

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A carnivore meaning 'meat eaters: any animal with a diet consisting mainly of meat, whether it comes from animals living (predation) or dead (scavenging).

Worms and insects are preferred food of carnivore, by definition of carnivores.

Correct Answer: Option 3

 
Living Environment Regents June 2008 Question 73 PDF Print E-mail
Thursday, 23 April 2009 10:35
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Correct Answer: Some reasons why scientists might want to know if two plant species are closely related are -

  • A related plant might provide a cheaper source of a substance.
  • Two related plants could produce similar substances of medicinal value to be used for production of medicines
 
Living Environment Regents June 2008 Question 72 PDF Print E-mail
Thursday, 23 April 2009 10:33
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Correct Answer:
  • DNA Sequences
  • Variety of enzymes present
  • Structure of molecules present
 
Living Environment Regents June 2008 Question 71 PDF Print E-mail
Thursday, 23 April 2009 10:31
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Correct Answer: A and C most of the characteristics are similar or same type of chlorophyll is present
 
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