New York State Chemistry RegentsNew York State Earth Science Regents

 
Evolution: Change Over Time
Living Environment Regents August 2008 Question 49 PDF Print E-mail
NYS Living Environment Regents August 2008

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Correct Answer: Option 1 – behavioral adaptation as a result of natural selection

Species of Bees do not get replaced by new ones. Hence, Option 2 is incorrect.

Gene structure of Bees does not get altered as a result of diet. Hence, option 3 is incorrect.

Bees reproduce sexually. Hence, option 4 is incorrect.

 
Living Environment Regents August 2008 Question 48 PDF Print E-mail
NYS Living Environment Regents August 2008
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If bees have better access to food, they can produce more offspring. By performing this dance, successful foragers can share with their hive mates information about the direction and distance to patches of flowers yielding nectar and pollen, to water sources, or to new housing locations.
 
Living Environment Regents August 2008 Question 47 PDF Print E-mail
NYS Living Environment Regents August 2008
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The relationship between the distance to the food source and the number of waggle runs in 15 seconds is -As one variable increases the other decreases or the closer the food source, the more waggle runs in 15 seconds.
 
Living Environment Regents August 2008 Question 17 PDF Print E-mail
NYS Living Environment Regents August 2008

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Correct Answer – Option 1

Behavioral genetics plays a significant role involves multiple genes. Studies of genes and behavior require analysis of families and populations for comparison of those who have the trait in question with those who do not. The result often is a statement of heritability. If the population or the environment changes, the heritability most likely will change as well. Most important, heritability statements provide no basis for predictions about the expression of the trait in question in any given individual

 
Living Environment Regents August 2008 Question 16 PDF Print E-mail
NYS Living Environment Regents August 2008

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Correct Answer – Option 2 – number of their ATP Molecules

ATP - Adenosine Tri Phosphate carries the energy necessary to facilitate all of the processes of human metabolism, but does not provide any significant information to study evolution.

However, the methods of reproduction, sequences in the DNA molecules and structure of protein molecules help in determining evolutionary relationships between organisms.

Hence, option2 is the odd one out.

 
Living Environment Regents August 2008 Question 15 PDF Print E-mail
NYS Living Environment Regents August 2008

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Correct Answer – Option 4 – bright-colored males

Since, the male offspring inherits the bright colors of the father, the option of dull-coloured males and bright-colored females is not possible. Also there is no assurance of dull-colored females. Hence, option 1, 2, 3 are incorrect.

 
Living Environment Regents August 2008 Question 04 PDF Print E-mail
NYS Living Environment Regents August 2008

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Correct Answer – Option 2 – There would be little chance for variation within the population.

Cloning in biology is the process of producing populations of genetically-identical individuals that occurs in nature when organisms such as bacteria, insects or plants reproduce asexually.

Cloning does not assure adaptation to changes in environment, rapid evolution or faster mutation rate hence the options 1, 3 and 4 are incorrect.

 
Living Environment Regents August 2010 Question 72 PDF Print E-mail
NYS Living Environment Regents August 2010

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Correct answer: (2) the selection of different shaped beaks that best suit different niches

Finches use their beaks for feeding. Thus, the shapes of their beaks depend on the type of food that they eat. Feeding habit is part one the ecological niche of organisms. Niche is the sum total of an organism's utilization of the biotic and abiotic resources of its environment.

Incorrect answers:

(1) asexual reproduction of these finch species

Asexual reproduction is the type of reproduction involving only one parent that produces genetically identical offspring by budding or division of a single cell or the entire organism into two or more parts. Finches do not undergo asexual reproduction. They produce offspring through sexual reproduction.

(3) the genetic recombination associated with mitotic cell division

This statement is incorrect because genetic recombination can only occur during meiosis, a two-stage type of cell division in sexually-producing organism that results in gametes with half the chromosome number of the original cell.

(4) the genetic engineering of the DNA of each of these species

Genetic engineering is not necessary to create finches with different types of beaks.
 
Living Environment Regents August 2010 Question 71 PDF Print E-mail
NYS Living Environment Regents August 2010
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The small and middle ground finches eat mainly plant food while the warber finches eat only animal food. Since the ground finches and the warber finches have an entirely different type of diet, then sharing an island as habitat would not be disadvantageous for both finches.
 
Living Environment Regents August 2010 Question 27 PDF Print E-mail
NYS Living Environment Regents August 2010
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Correct answer: (2) There are few native predators of rabbits.

When there are few predators of an organism, then that organism faces less risk in survival. Reproduction rate would be high, and mortality rate (usually caused by predation or shortage of food) would be low.

Incorrect answers:

(1) Rabbits have a high metabolic rate.

The higher the speed of metabolism, the more food would be needed in order for the population of rabbits to survive. Thus, metabolic rate is not a factor in the predominance of rabbits in the area.

(3) Additional rabbit species have been introduced.

If additional rabbit species were introduced, then there would be more species to compete with the resources available. This will eventually lead to death of some rabbits, instead of increase in number.

(4) There is an increase in rabbit competitors.

If there are many competitors for the rabbits, then there would be shortage of food, which may lead to death of a number of rabbits and its competitors.
 
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