Lesson 54 of 84 · Cells
Experiment⭐ 30 XP🌿 Wild JungleHomologous Structures: Evidence for Evolution (Part 3)
Homologous Structures: Evidence for Evolution (Part 3).
🎯 Your mission
Set it up. Test it. Be amazed.
⚡ The twist
Every species solves the same problem differently.
Mind = Blown
🐙 An octopus has 9 brains and 3 hearts.
Make a hypothesis first
Before you watch: what do you think it'll do?
What You'll Learn
Homologous structures are similar body parts in different species that suggest a common ancestor. The arm bones of humans, whales, bats, and dogs share the same basic structure.
Key Words
- adaptation
- fossil record
- species
Materials Needed
- iodine stain
- paper
- colored pencils
- coins (for Punnett squares)
Safety First
- Work in a well-ventilated area when using vinegar or other strong-smelling substances.
- Dispose of materials properly after the experiment.
Steps
Read about Cells and write down three key facts.
Research one genetic disorder. Create an infographic showing its cause, symptoms, and how it is inherited.
Watch carefully for any changes and note the time.
Create a data table to organize your measurements.
Check Your Understanding
Question 1
1 of 3What are homologous structures?
Where you see this in real life
Your own body is doing this thousands of times every second.
Stretch Challenge
Try this in real life this week.
Find one thing about your body that's different from a friend's. Wonder why.
For the dinner table
“Tell me something you noticed about your own body today.”
Next Smart Experiment
We'll pick an experiment that matches exactly how you're thinking right now.
Share this experiment
Send it to a parent who's looking for a 10-minute kitchen science win.
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