New York State Chemistry RegentsNew York State Earth Science Regents

 
Laboratory Skills: Scientific Inquiry and Techniqu
Living Environment Regents August 2008 Question 63 PDF Print E-mail
NYS Living Environment Regents August 2008
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The control that should have been set up for the experiment described in paragraph C is that, there should have been a group of people sleeping in night shirts or bedding that had not been used by yellow fever patients.
 
Living Environment Regents August 2008 Question 62 PDF Print E-mail
NYS Living Environment Regents August 2008
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Hypothesis – Yellow fever is spread by contact with the clothing of people who had yellow fever.
 
Living Environment Regents August 2008 Question 61 PDF Print E-mail
NYS Living Environment Regents August 2008
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The problem described in the above scenario, was to determine how the yellow fever microbe was being transferred from one person to another.
 
Living Environment Regents August 2008 Question 55 PDF Print E-mail
NYS Living Environment Regents August 2008

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Organisms with antibiotic resistance would survive and reproduce. Others without resistance would decrease in number.

The culture where the bacteria were resistant to the antibiotic survived to reproduce and grow.

The culture which had bacteria which were not resistant to antibiotic would decrease in number and slowly get eliminated.

 
Living Environment Regents August 2008 Question 54 PDF Print E-mail
NYS Living Environment Regents August 2008
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To arrive at accurate results, one factor that should be kept constant each time water sample are collected from the lake is collection of sample under similar weather conditions
 
Living Environment Regents August 2008 Question 53 PDF Print E-mail
NYS Living Environment Regents August 2008
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According to the data table and the graph, the pH level decreased over the time period from 1980 to 1996.
 
Living Environment Regents August 2008 Question 52 PDF Print E-mail
NYS Living Environment Regents August 2008
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Living Environment Regents August 2008 Question 51 PDF Print E-mail
NYS Living Environment Regents August 2008
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The y-axis should have a scale with a difference of 0.2
 
Living Environment Regents August 2008 Question 50 PDF Print E-mail
NYS Living Environment Regents August 2008
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pH Level on Y-axis and Year on X-axis
 
Living Environment Regents August 2010 Question 75 PDF Print E-mail
NYS Living Environment Regents August 2010

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Correct answer: (3) Diffusion

Diffusion is the spontaneous tendency of a substance to move from an area with high concentration to an area of low concentration. Since the concentration of glucose and starch is higher inside the artificial cell, it is expected that the glucose and starch molecules would move out of the artificial cell to reach equilibrium in concentration. This movement will be manifested by the change in the color of the outside solution due to the presence of the starch indicator.

Incorrect answer:

(1) carbohydrate synthesis

Carbohydrate synthesis is the process of forming carbohydrate structures. In living organisms, this occurs naturally. For instance, during dark reactions in plants, adenosine triphosphate (ATP) and nicotinamide adenine dinucleotide phosphate (NADPH) are used to convert carbon dioxide into carbohydrate. This is a complex process, thus the setup above cannot represent carbohydrate synthesis.

(2) active transport

Active transport is another type of substance movement across a biological membrane against a concentration gradient with the help of energy and transport proteins. There was no energy input illustrated in this setup.

(4) dehydration

Dehydration refers to the excessive removal of water from the body. Water was not removed from the setup, thus, the illustration does not represent dehydration.


 
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