Download (36)Before you arrive for the Survey of the Animal Kingdom: Phyla

(36)Before you arrive for the Survey of the Animal Kingdom: Phyla
Porifera and Cnidaria lab, please
1. Read the lab thoroughly, noting all safety guidelines.
2. Answer these preparatory questions:
What safety procedures should you be sure to follow during this lab period?
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Why are poriferans and cnidarians considered to be animals?
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Which environmental variables might influence the shapes of sponges?
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Describe digestion in sponges. How is it different from human digestion?
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What regulates water-flow into and out of sponges?_________________________
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In the following diagram identify the parts of a sponge body wall and list a
function for each part. Add spicules and amoebocytes to the diagram.
Describe asexual reproduction in sponges._________________________________
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How do sponges avoid self-fertilization?___________________________________
Compare the ways that cnidarians and poriferans obtain food.
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What are the three basic layers of the cnidarian body plan?___________________
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Use the following table to compare the features of poriferans and cnidarians:
Characteristic
Porifera
Cnidaria
Type of symmetry
Are tissues present?
Name of flagellated cell
is...
Name of gelatinous
matrix is...
Intra or extra cellular
digestion
Type of asexual
reproduction
What are the two body-forms of cnidarians?________________________________
How does the distribution of the gelatinous matrix differ in the two body types?
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Which features of cnidarian do members of the Class Hydrozoa lack?__________
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How do members of the class Scyphozoa differ from other cnidarians?_________
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Which body-form is not present in class Anthozoa?_________________________
In the following table, list the type of animal that exemplifies each class.
Cnidarian class
Type of animal
Hydrozoa
Scyphozoa
Cubozoa
Anthozoa
Are primitive characteristics low-functioning? Explain your answer.
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What is another name for a jellyfish? Which name is a more accurate
description? Explain your answer.
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What is the genus of the sponge that is to be examined in this lab? ___________
Your instructor has charged your lab group with the identification of an unknown
specimen. The only information that you are given is that it is either a member of
the Phylum Porifera or the Phylum Cnidaria, it is discussed in this lab, and the
animal that you are observing is an adult. As your group observes the animal,
you note the following: absence of pores, a pedal disc, a pharynx, septa, and a
ring of tentacles around the mouth. What is the identity of this creature?
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