Biology - M. Murphy
Lab: Invertebrates
Next, Use the key below to identify the invertebrate phylum of the organism
shown.  

Remember, always start with step one for each new organism.
Biology - M. Murphy
Lab: Invertebrates
Correct!  Sponges are in the phylum Porifera.

Before moving on, watch the following video and answer the question(s).  
Each organism in this lab will have a video to watch and at least one question to
answer.  Type your question answers in a Word document for upload to the lab
dropox.

Porifera video:
 https://www.youtube.com/watch?v=RmPTM965-1c&list=PLFF5FEEA48AF4A163

Porifera question:
1. Describe what the green dye in the video represents and the role of water currents in
this process.
Dichotomous Key for Invertebrates:

1a. Animal has no regular body symmetry ........................................................ Porifera
1b. Animal has regular body symmetry ............................................................. go to 2

2a. Animal has radial body symmetry ............................................................... go to 3
2b. Animal has bilateral symmetry .................................................................... go to 4

3a. Animal has an endoskeleton ......................................................................
Echinodermata
3b. Animal does not have an endoskeleton ..................................................... Cnidaria

4a. Animal has one digestive tube opening ...................................................... Platyhelminth
4b. Animal has two digestive tube openings ..................................................... go to 5

5a. Animal has a pseudocoelomate body plan .................................................
Nematoda
5b. Animal has a coelomate body plan ............................................................. go to 6

6a. Animal has a chitin exoskeleton and jointed appendages ..........................
Arthropoda
6b. Animal does not have a chitin exoskeleton or jointed appendages ............ go to 7

7a. Animal body is formed by repeating ring segments ....................................
Annelida
7b. Animal body is not formed by repeating ring segments .............................. Molluska