Purpose

In this first activity for Lesson 5.2, you will be asked to record your initial thoughts about how planarians regenerate body parts and revisit these questions at the end of the lesson. You should be able to use what they have learned about mitosis and cell differentiation to explain how planarians regenerate body parts. You will collect related evidence throughout the lesson on cell division and its role in the development and maintenance of multicellular organisms.

Instructions

You will begin this lesson in your textbook. Carefully read (and re-read as needed) the Engage section. (You will need to be logged in for these links to work.)
Download the Lesson 5.2 Worksheet. You can choose to use the Word version or the GoogleDoc.
- You should complete all questions and activities listed for Activity 5.2.1.
- Be sure to save your work.
- Note that you will not submit anything for this activity - all work will be submitted at the end of the lesson, in Activity 5.2.7.
As you read, follow the Worksheet Guidelines listed below.
In your Evidence Notebook, record anything you find relevant and interesting as you explore the textbook. Keep in mind your main goal - gathering evidence to make a claim about how organisms like the planarian regenerate parts of their body and how could humans benefit from this knowledge.

Worksheet Guidelines

Unit 5.2: Mitosis and Differentiation - Engage

The Engage section begins with an image of HeLa cells, a line of cancer cells used for research, that can divide indefinitely. There follows an image showing planarians before and after amputation and a paragraph description of the planarians.
Note the textbook reminder:
GATHER EVIDENCE Record observations describing what happens to the part of the planarian that was amputated. How does this piece change over time?

Always keep in mind your Evidence Notebook, and keep adding to it.
In your Worksheet respond to the following Self Check question:

How do you think organisms like the planarian regenerate parts of their body? How could humans benefit from this knowledge?
That is it for Activity 5.2.1. Please remember to save your Worksheet file when you finish editing it, and be sure you know how and where to find it when you go on to Activity 5.2.2.
Now, click NEXT below to go on to the next activity.

Assignment Resources