Posted: October 9th, 2022

When do both events occur?

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For this week’s participation task, you will use your textbook (chapter 4) to find examples of the forces of evolution and also the “Why Sex?” film linked in the module. Your book gives several real-world examples/studies of how these forces of evolution are seen in human and non-human populations (see page 99 what the four forces of evolution are).
– Pick at one of the case studies described in your book. Describe the example and explain how it demonstrates that particular force of evolution. What are/were your thoughts when you read about it?
Watch the “Why Sex?” film from the beginning to at least the time described in the instructions (minute 26). What force of evolution do you think is shown from the experiment with minnows? Also, what does the experiment say about why sexual reproduction evolved? What are your thoughts on the experiment and implication (why sex evolved) stated in the film? You may use part of this answer for the section on this video in the assignment.

Extra Credit (5 points):
Consult the “13.8 Billion Years” page in this module (2 pages). This calendar shows when major universe, geologic and biologic milestones would have occurred if 13.8 billion years (time since Big Bang) were compressed into one calendar year.
13.8 Billion Years
Last Month of Calendar
Look at the overall calendar and find when life first emerges on earth. Next find when primate and human (hominin – or “hominid” as calendar shows) evolution began.
When do both events occur?
What does this show regarding the relative length of time that primates/humans have been on earth (i.e. have we been around for a relatively long or short time)? Going back to the “Why Sex?” film, please consider the minnow experiment and consider which of the four forces of evolution (or components of the forces of evolution) are represented in the scenario (there can be more than one). Explain why you think this.

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