SI 1.27.14

Match up the characteristics (some may  be used multiple times for different classes... i.e. - lacks pedicellaria) below with the appropriate classes of Echinodermata: Asteroidea, Crinoidea, Ophiuroidea, Echinoidea, Holothuroidea

• sea star
• podia with suckers
• feather stars
• lacks pedicellaria
• elongated oral/aboral axis
• long spines
• dome body shape
• obvious central disk
• sea daisy
• maderoporite on aboral side
• mouth and anus on oral side
• suspension feeders
• sea cucumbers
• clean ocean floors 
• pedicellaria emit toxins
• long slender flexible appendages
• broad arms and body
• sea lilies
• stalk with flower like appendages
• internal maderoporite
• expels tissue with toxins
• sand dollars
• basket stars
• podia lack suckers
• predators
• lack maderoporite
• lacks spins
• reduced ossicles
• sea urchin
• grazer of plants on ocean floor
• brittle stars
• maderoporite on oral side

The following are student developed questions that may help you study:

1. In which of these does the mouth form first? Circle all that apply (CATA)
1. crinoidea
2. deuterostomes
3. sea stars
4. protostomes
5. holothuroidea
2. What characteristic is not true of Echinoderms?
1. water vascular system
2. dermal papulae
3. tetraradial symmetry
4. calcareous endoskeleton
3. What is the cavity that forms in the gastrula from the blastopore
1. coelom
2. mesoderm
3. gut
4. blastocoel
4. T/F - Echinoderms maintain pentaradial symmetry throughout their lie cycle.
5. Papulae are used for which of the following?
1. respiration
2. reproduction
3. movement
4. cleaning the skin surace
6. Which of the following is not present in a diploblastic organism?
1. endoderm
2. ectoderm
3. mesoderm
7. T/F - A zygote undergoes gastrulation creating a gut cavity
8. What class do sea stars belong to?
1. Ophiuroidea
2. Holothuroidea
3. Asteroidea
4. Echinoidea
9. What class do sea urchins belong to?
1. Ophiuroidea
2. Holothuroidea
3. Asteroidea
4. Echinoidea
10. What lines the coelom in a true coelomate organism?
1. ectoderm
2. endoderm
3. mesoderm
4. blastocoel
11. What are the two developmental body plans present in Phylum Echinodermata?
1. radial
2. bilateral
3. spherical
4. pentaradial

Who am I questions:

1. My maderoporite is on my aboral side. I have arms, suckers, and an open ambulacral groove. What class do I belong to? What is my common name?
2. I went through enterocoelous coelom formation, what am I?
3. I am an adult, have bilateral symmetry and a water vascular system. What class do I belong to? What is my common name?
4. If you step on me it usualy hurts because I have long, movable spines and my pedicellaria contain toxins. What class do I belong to? What is my common name
5. My maderoporite is on my oral side, I have no suckers, and my ambulacral groove is closed and covered by ossicles. What class do I belong to? What is my common name?
6. I live deep in the oceans and have a stalk with lower-like appendages, my mouth and anus are on my oral side. What class do I belong to? What is my common name?

Draw a sea star and label the following parts:

• maderoporite
• stone canal
• ring canal
• radial canal
• ampulla
• podia
• lateral canal
• ambulacral groove

Below is a link to a practice quiz that may help you study - you don't need to know all of these so don't freak out if the material doesn't seem familiar.

http://highered.mcgraw-hill.com/sites/0073031208/student_view0/chapter47/multiple_choice.html