Friday, July 31, 2009

Can u double check my answers?

Can you doulble check my answers? These questions are worth a lot of points and i want to make sure i got them all right. Thanks :]





3. According to the modern theory of evolution,





A. Lamarck was completely wrong.


B. random gene mutation is a component of evolution.


C. punctuated equilibrium has replaced natural selection.


D. the diversity of life-forms resulted from the inheritance of acquired characteristics.





My answer: D





2. In Lack's study, the effect of weather on the size of the finch's beak is an example of





A. industrial melanism


B. isolation


C. Fossilization


D. Natural selection





My answer: D

Can u double check my answers?
the first question's answer is B.





It is not D because diversity of life-forms doesn't result from inheritance of acquired characteristics. acquired characteristics is like gaining muscles from weight-training. that is not going to be passed down to your offspring. what creates new gene variety is random mutations. because of differences in genetics, some individuals are more likely to survive and reproduce (greater fitness) so they leave more offspring and their genes are passed down, causing the population as a whole to evolve.





the second question's answer is D, so you're correct. change of weather causes different seeds to be available, therefore, different beak sizes would be naturally selected. however, it is important to note that individuals do not evolve, it is the population that does. the fittest leave the most offspring and passes down their genes, the least fit will either not survive or they won't be able to pass down their genes.
Reply:I agree with your answers.
Reply:You have question 2 correct.


In question 3: A is wrong (Lamarck was right in that characteristics are passed down to offspring), C is wrong (punctuated equilibrium is a pattern seen in evolution over time, while natural selection is a component of evolution). D is not right either. Acquired traits cannot be passed down to offspring, because they do not influence the genome. B is right. Evolution is comprised of 4 things: mutation, gene flow, genetic drift, and natural selection.


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