Click here to download the Unit 4 textbook worksheets as a PDF file.

Click here to download the Unit 4 lab worksheets as a PDF file. (Acrobat reader plug-in is required.)

Click here if you need instructions on downloading worksheets

Textbook Assignment:

Step 1: Read Chapter 7, pages 115 –134 in your textbook (Marine Biology, 7th edition, by Castro and Huber) and answer the questions on your worksheets.

NOTE: Chapter 7 is broken into two parts: Unit 4 and Unit 5.

Click here to see the Unit 4 Learning Objectives.

Click here to see the answers

Lab Activities:

Please follow the directions below and answer the related questions on your worksheet.

Step 2: Complete Textbook Activity–Comparing Invertebrates, Part 1 This review activity can be done anywhere.
(no lab points but important for your test)

Step 3: Complete Lab Activity–Survey of Marine Invertebrates, Part 1 This lab must be done in the Biology Learning Center.

Step 4: Complete Lab Activity–Using a Dichotomous Key, Part 1 This lab must be done in the Biology Learning Center.

Click here to download the Phylum Dichotomous Key and here to download the Phylum and Class Dichotomous Key. Please note that these are very large files. Instead of downloading them, you can ask to borrow copies at the front desk.

Optional Activities:

Step 5: Internet Activity–Gallery of Marine Life
This website has information about marine phyla and classes, including practice quizzes.

Step 6: Lab Activity–Invertebrate Specimens
Explore kits with examples of invertebrates from the phyla and classes covered in this unit.

Practice Quiz and Test:

Step 7: Prepare for the Unit 4 Exam. Study your completed worksheets. Click here to take the online self test.

Review your Step 4 worksheets--Your test includes 10 questions that use the dichotomous keys and a box of specimens for you to identify.

Step 8: Come in to the Biology Learning Center to take your Unit 4 Exam. The exam will consist of 30 multiple choice questions and a 10 question lab practical using the dichotomous keys.