3. In his artide \'On the origin ef Serual Reproduction Carl Zimmer described th

Question

3. In his artide 'On the origin ef Serual Reproduction Carl Zimmer described the three main bypotheses ('the Good the Bad, and the Ugly) regarding the evolution of sex a. Briefly explaln how the Bad hypothesis would explain the evolution of sexual reproduction in populations living in areas with high exposure to UV radiation (a known source of DNA damage). In certain species of snail found in New Zealand, both sexual and asexual populations can be found cohabitating across several ponds and lakes. Some of these ponds are close to the seashore and sporadically exposed to salt water (based on the height of the tide as well as the severity of seasonal storms), while ponds farther inland are fairly shielded from seawater and have a more consistent water quality. You examine the percent of sexual reproduction occurring in ponds as a function of their distance from the seashore and find the results shown at right. Which of the three hypotheses discussed by Zimmer (2009) best explain the pattern seen here? Clearly and thoroughly justify your answer b.

Explanation / Answer

3. (a) Bad hypothesis for the given question:

UV radiation enhanced the sexual reproduction as compare to asexual reproduction because it UV radiation enhances the genetic back up that promoted sexual reproduction.

3. (b)

In this question, the hypothesis as given in the question come under the category of “ good hypothesis” as researchers examine the percent of sexual reproduction occurring in a pond as a function of their distance from the sea shore and find it correct. Researchers has performed the experiment and find the correct result as it mention in the hypothesis. So, it come under the category of “ good hypothesis”

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