57
Lesson 57 of 84 · Evolution
ExperimentAdaptations Over Generations (Part 3)
What You'll Learn
Cells are the basic units of life. All living things are made of one or more cells. Plant cells have cell walls and chloroplasts that animal cells lack.
Key Words
- allele
- cell
- nucleus
Materials Needed
- onion skin
- iodine stain
- paper
Safety First
- Do not taste any materials.
- Wear safety goggles when mixing liquids.
- Wash hands after handling materials.
Steps
Step 1 — Read
Review the background information on Evolution before starting.
Step 2 — Do
Model mitosis using pipe cleaners as chromosomes. Show each phase: prophase, metaphase, anaphase, and telophase.
Step 3 — Observe
Draw a detailed diagram of what you observe.
Step 4 — Record
Write a conclusion: what did your results show? Did they match your prediction?
Check Your Understanding
Question 1
1 of 3What is the basic unit of life?