New York State Chemistry RegentsNew York State Earth Science Regents

 
Ecology
Living Environment Regents January 2008 Question 31 PDF Print E-mail
NYS Living Environment Regents January 2008

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Option 4 – The quantity of data will lead to a better understanding of the extent of the problem.

The data collected over a large span of time, region and species helps in gaining better accuracy in the analysis.

 
Living Environment Regents January 2008 Question 29 PDF Print E-mail
NYS Living Environment Regents January 2008

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Option 3 – Development of equipment that uses solar energy to charge batteries

Sun light is the best natural resource that is converted into electricity. Rather than using expensive natural gas, oil, coal or wood for meeting energy requirements, you can save on a huge amount of money and electricity by utilizing the renewable solar energy.

Some of the environmental benefits resulting by the use of solar energy are

  • •    Reduced air pollution
  • •    Offset of greenhouse gases
  • •    Reduced need for other sources of energy

 

 
Living Environment Regents January 2008 Question 28 PDF Print E-mail
NYS Living Environment Regents January 2008
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Option 4 – a decrease in the amount of oxygen released into the lake

Most of the oxygen in the atmosphere comes from one-celled plants in the oceans, like algae. They are likely to produce a lot of oxygen per unit weight because they don't have non-photosynthesizing bark, roots, branches, etc., nor a major dormant period like temperate-zone plants.
 
Living Environment Regents January 2008 Question 27 PDF Print E-mail
NYS Living Environment Regents January 2008

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Option 1 – decrease available habitats

Industrialization leads to increase in pollution, hence increasing global warming.

Industrialization is one of the parts in an ecosystem but, is not an element of stabilization.

Industrialization alone cannot lead to an increase in the carrying capacity of a native species in an ecosystem.

Carrying capacity refers to the number of individuals who can be supported in a given area within natural resource limits, and without degrading the natural social, cultural and economic environment for present and future generation

 
Living Environment Regents January 2008 Question 26 PDF Print E-mail
NYS Living Environment Regents January 2008

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Option 2 – Ecological Succession

Ecological succession is the gradual process by which ecosystems change and develop over time. Within any community some species may become less abundant over some time interval, or they may even vanish from the ecosystem altogether. Similarly, over some time interval, other species within the community may become more abundant, or new species may even invade into the community from adjacent ecosystems. This observed change over time in what is living in a particular ecosystem is "ecological succession".

 
Living Environment Regents January 2008 Question 25 PDF Print E-mail
NYS Living Environment Regents January 2008

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Option 2 - Rabbit
In this food web, the Mouse and Rabbits are dependent on the same food – Berry Bushes. Hence, increase in the Mouse population will lead to an imbalance and competition for food between the Rabbits and Mice.

 
Living Environment Regents January 2008 Question 24 PDF Print E-mail
NYS Living Environment Regents January 2008

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Option 3 - Energy
Energy is produced when one component such as water is converted into another form such as hydrogen and oxygen. Energy can be utilized, but cannot be stored. Hence, it cannot be recycled.

 
Living Environment Regents January 2008 Question 23 PDF Print E-mail
NYS Living Environment Regents January 2008

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Option 1 – number of autotrophs

Biotic factors are related to life or living factors. Plants, animals, fungi, protist and bacteria are all biotic or living factors.

Organisms which are able to make their own food (in the form of sugar) by using sunlight are called autotrophs.

Temperature, salt content and pH of water are non living factors of the ocean ecosystem.

 
Living Environment Regents January 2008 Question 21 PDF Print E-mail
NYS Living Environment Regents January 2008
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Option 3 – Cells carry out the process of respiration

The activity of generation of energy in plants by using sun light is called photosynthesis.
Photosynthesis is a metabolic pathway that converts carbon dioxide into organic compounds, especially sugars, using the energy from sunlight. Photosynthesis occurs in plants, algae, and many species of Bacteria, but not in Archaea.
 
Living Environment Regents January 2008 Question 15 PDF Print E-mail
NYS Living Environment Regents January 2008

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Option 4 – 4

The populations with the highest percentage of variation for a given trait are likely to survive most environmental changes.

 
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