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Living Environment Regents August 2008 Question 67 |
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Saturday, 25 April 2009 05:03 |
Vaccination helps the white blood cells to produce antibodies for this particular disease and be prepared to prevent the attack by this virus in the future.
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Last Updated on Monday, 30 November 2009 15:57 |
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Living Environment Regents August 2008 Question 66 |
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Saturday, 25 April 2009 05:02 |
The immune system is most directly affected by a vaccination. The immune system becomes prepared with the defense mechanism (antibodies for this virus) to prevent the disease from occurrence when there is a virus attack.
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Last Updated on Monday, 30 November 2009 15:57 |
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Living Environment Regents August 2008 Question 65 |
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Saturday, 25 April 2009 05:00 |
Vaccine contains dead or weakened viruses or their products. This dead or weakened virus stimulates the white blood cells to produce antibodies for this specific type of virus, thus helping the body to be prepared with the defense mechanism against the disease that can be caused by a live or healthy virus.
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Living Environment Regents August 2008 Question 64 |
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Saturday, 25 April 2009 04:58 |
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 Native fish will not have any negative effect on other species.
But, pesticides will not only kill the mosquitoes but also affect other species which may harm the ecosystem.
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Living Environment Regents August 2008 Question 63 |
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Saturday, 25 April 2009 04:56 |
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.
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Living Environment Regents August 2008 Question 62 |
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Saturday, 25 April 2009 04:51 |
Hypothesis – Yellow fever is spread by contact with the clothing of people who had yellow fever.
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Last Updated on Monday, 30 November 2009 16:32 |
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Living Environment Regents August 2008 Question 61 |
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Saturday, 25 April 2009 04:41 |
The problem described in the above scenario, was to determine how the yellow fever microbe was being transferred from one person to another.
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Living Environment Regents August 2008 Question 60 |
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Friday, 24 April 2009 11:40 |
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Killing Mountain Lion lead to fewer cattle being killed.
But, this lead to an increase in the population of Deer and Rabbits which had fewer predators now and in turn caused the grain crops decreased.
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Living Environment Regents August 2008 Question 59 |
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Friday, 24 April 2009 11:38 |
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Populations of two specific animals that most likely increased are Rabbit and Deer
The reason behind the increase in the population of these animals in the food web is that they had fewer predators(Mountain Lions).
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Living Environment Regents August 2008 Question 58 |
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Friday, 24 April 2009 11:37 |
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The brown tree snakes eat birds’ eggs and reduce bird population in the ecosystem which leads to an imbalance in the ecosystem.
Zebra mussels may compete with the native species leading to decrease in number and finally extinction of the native species.
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