13 Jun BIO 112: Porifera and Cnidarian Lab
Question
BIO 112: Porifera and Cnidarian Lab
Virtual Lab
Phylum Porifera: McGraw Hill Lab
Data –
Name of Organism
Type of Feeder
Journal Questions
1. Describe each of the four types of feeders identified in this activity. Explain how various invertebrates have
adapted to feeding in their environment.
2. Why are filter feeders usually stationary organisms?
3. Early scientists classified sponges as plants. Based on observations of the sponge’s feeding system, why do
you think scientists now classify sponges as animals?
4. Jellyfish cannot swim rapidly, yet they are efficient predators. How are they adapted to predatory life
despite their lack of speed?
5. Why are scavengers usually found in the lower part of the coral reef habitat?
6. How do internal parasites keep from being washed out of their host’s bodies in the body fluids or wastes?
7. How do the methods for obtaining food change as an organism’s complexity increases?
8. Label the sponge diagram:
Phylum Cnidarian: Biology Corner
I. Prelab Questions:
1. The Hydra belongs to the Kingdom _________________ and the Phylum ___________________.
2. What are Cnidocytes?
3. Where do hydra live?
4. Name two other organisms that are closely related to the hydra.
5. View the videos of a living hydra and observe under scanning and low power. Note that hydra is visible on the
slide without a microscope. Describe the hydra. What does it look like? How does it move?
6. Count the number of tentacles on your hydra. How many does it have? ____________
Compare this number to the other hydra in the second video. Are all hydras the same? _______
II. Hydra Anatomy
Word Bank:
Gastrovascular cavity
Endoderm
Nematocyst
Label each of the parts of the hydra:
Tentacle
Mesoglea
Mouth
Cnidocyte
Ovary/Teste
Basal Disk
Answer the following questions:
1. To what kingdom do cnidarians belong?
a. Animalia
2. What could a hydra eat?
b. brine shrimp
a. algae
b. Porifera
Ectoderm
Bud
c. Cnidarian
c. jellyfish
3. Which of the following remains mostly stationary, attached to surfaces?
a. jellyfish
b. sea anemone
c. hydra
4. A "bud" is formed by a hydra as a means of:
a. defense
b. swimming
5. Anthozoans were named such because:
a. they looked like flowers
b. they were found near Anthoa
c. reproduction
c. they have stingers
6. Which cnidarians is most likely to be studied in a biology class?
a. jellyfish
b. sea anemone
c. hydra
7. Which of the following characteristics are common to ALL cnidarians?
a. stinging cells
b. live in oceans
c. medusa body form
8. How does a hydra remove wastes or undigested material?
a. exits through an anus b. regurgitated from the mouth
9. Jellyfish belong to the Phylum ______ and the Class ______.
a. Cnidaria, Anthozoa
b. Scyphozoa, Cnidaria
c. absorbed through the tentacles
c. Cnidaria, Scyphozoa
10. What structure allows a jellyfish (and other cnidarians) to respond to its environment?
a. central nervous system
b. nerve net
c. gastrovascular cavity
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