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From anteaters to zebras, why are both sexes equally represented in number? Explore a quirk in evolution with a video from a thought-provoking science playlist. The narrator shows examples of species that might only need a few males, then discusses how natural selection always causes the numbers of males and females to even out over generations.
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CCSS:
Adaptable
Concepts
Additional Tags
Instructional Ideas
- Pose the question of equal numbers between sexes to the class to get them thinking about it before the video begins
- Have individuals research to find examples of animal species where numbers are not equal
Classroom Considerations
- Show the video after pupils have knowledge about evolution and natural selection
- This video is hosted on YouTube
Pros
- Humor and great scripting make the video very enjoyable
- The subject matter is explained in student-friendly terms
Cons
- None