Biology Forums - Study Force

1. Over 200 years ago, all of the peppered moths in a certain population were light-coloured. How could the first dark-coloured moth have occurred in the population? (Hint: How are new variations created in populations?)

2. Explain how a variation that at one time gave a selective advantage became a disadvantage when the environment changed. How did this affect the variation in the population of peppered moths?

3. Some mutations provide an organism a selective advantage in the environment and some provide a selective disadvantage. Give examples from the lesson of these different mutations.

4. Organisms that reproduce sexually have an evolutionary advantage over organisms that reproduce asexually. Explain and support this statement.

5. What selective pressure is causing the change in the insect resistance?

6. Explain how some insects develop resistance to pesticides in terms of natural selection.

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