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NAME: _________________________________________________________ PERIOD: _______ DATE: _____________
Phylum Porifera and Cnidaria Test Review
Classification
1. Invertebrates with asymmetry that also bear pores are in Phylum _____________________.
2. Invertebrates with nematocysts and radial symmetry are in Phylum ______________________.
3. Colonial Cnidarians where organisms have one of three ‘jobs’ would be in Class ______________.
4. A cnidarian with the polyp as the dominant life form would be in Class ____________________.
5. An invertebrate with the medusa as the dominant form would be in Class __________________.
6. Cnidarians with four pedalia and are very toxic would be in Class ________________________.
Sponges
Match the type of cell/structure to the correct function:
7. ______Choanocyte
a. opening through which water and wastes leaves
8. ______Osculum
b. cell that creates a pore for water to enter the sponge
9. ______Porocyte
c. ingest and digest food
10. ______Amebocyte
d. produce a current inside the sponge
11. All sponges are ____________________ meaning that they are attached to a surface and are unable to move
around.
12. The flagellated, food trapping cells of a sponge are called ____________________________.
13. Sponges actively strain water for small suspended food particles. They are known as
________________________________.
14. The sponge is considered a “simple” animal because it is organized at the ( TISSUE / CELLULAR) level.
15. The skeletal material (silica or calcium carbonate) found in sponges are called
____________________________________.
16. Sponges are found mainly in _______________________ environments, very few are found in
___________________________ environments.
17. Correct the following statement: Sponges are found only in cold polar waters.
18. There are three classes of sponges and each is characterized by differences in its skeletal and support structures.
List each Class of sponge and its main skeletal support structure.
a. Class __________________________________ has __________________________
b. Class __________________________________ has __________________________
c. Class __________________________________ has __________________________
Cnidarians
19. Cnidarians are characterized by having nematocysts, a nerve net and ____________________ symmetry.
20. Cnidarians become rigid body cavities only when they are filled with fluid under pressure. This type of skeleton
is called a ________________________________________.
21. How do Cnidarians respire? _______________________________________.
22. Cnidarians have a __________________________________ digestive cavity.
23. When asexual reproduction (called ____________________________) occurs, small
___________________________, called ephyra, break off from the ___________________ form of the
organism. This makes the life cycle of jellyfish very unique!
24. During ______________________ reproduction, an egg and sperm released from the medusa form fuse to form
a zygote which then grows into a ciliated free swimming larval form called a _____________________________.
25. Corals and jellyfish are both classified as cnidarians because they have stinging cells called
__________________________________.
26. Corals and sea anemones are both in Class Anthozoa because they are predominantly in
__________________________ form.
27. The coiled thread with a barb at the end is called the ________________________________.
28. The group of cells that line the stomach or a cnidarian are called the ____________________.
29. The ectoderm or outer cells of an organism are called the _____________________________.
30. The gelatinous material inside the medusa of a cnidarian is called the
____________________________________________.
31. The stinging cells inside tentacles are called ______________________________________.
32. The symbiotic relationship where both organisms benefit is ___________________________.
33. The symbiotic relationship where one organism benefits, but the other is unaffected is
_________________________________________.
34. The symbiotic relationship where one organisms benefits and the other is harmed is
____________________________.
35. The type of water that coral reefs need to survive should be _____________________,
_________________________, and shallow.
36. Why do coral reefs need plenty of sunlight?
37. Budding occurs when a new sponge breaks off from an older sponge. This is an example of
________________________________ reproduction.
38. The ________________________________ (or box jellyfish) is so deadly that it can
__________________________________________________________.
39. Clownfish are immune to the ____________________________ of sea anemones because the Clownfish have a
______________________________________ protecting them. Clownfish lure prey in for the sea anemone
while getting protection from the anemone. This is an example of what type of symbiotic relationship?
_____________________________
Diagrams
40. Label the diagram to the right.
a. _________________________
b. _________________________
c. _________________________
d. _________________________
e. _________________________
f. _________________________
41. Label the body forms on the figures below.
__________________ _____________
42. Label the diagrams below.