c. Time i. Explain the role of time in evolution - Biological evolution refers to the cumulative changes that occur in a population over time. These changes are produced at the genetic level as organisms’ genes mutate and/or recombine in different ways during reproduction and are passed on to future generations. 2. In your own words, how do the 3 parts of the “ evolution recipe” work together to evolve species and increase biodiversity. - Variation means for a certain trait there are differences between individuals. Heritability means that those differences come from genes that pass from parent to offspring. Heritable differences are written in DNA. reproductive advantage means individuals with a certain trait are more successful for reproducing than others. Over multiple generations, unfavorable variations decrease in a population and favorable ones become more common. If any of these ingredients are missing it’s not natural selection.
Part B : Learn about the basics of evolution at 3. What is evolution and what is it responsible for? - It is the process by which modern organisms have descended from ancient ancestors. It’s responsible for both remarkable similarities we see across all life and the amazing diversity of that life. 4. [Click ‘next’] When does evolution take place? - Evolution only occurs when there is a change in gene frequency within a population over time. 5. Only inherited __genetic____________________ differences that can be passed on are acted upon by evolution. 6. Compare the two examples of changes in beetle populations. Which of the two scenarios is an example of evolution? Defend your answer with an explanation .
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