Sponge and Cnidarian Review

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TRUE OR FALSE. Write + if the sentence is correct or write O if it is incorrect.
If the statement is false, change the statement to a correct one.
____F - no______ 1. Sponges have tissues and organs.
__F – internal____ 2. Gemmules are external buds made by sponges to reproduce.
___T___________ 3. Amebocytes move around and distribute food in sponges.
_F - porocytes___ 4. Water enters a sponge through its osculum.
__F - not_______ 5. Cnidarians are filter feeders.
___T___________ 6. Pores in sponges are called Ostia or porocytes.
___T___________ 7. Members of the class Anthozoa build up and form reefs.
___T___________ 8. Spicules help make up the skeleton of sponges.
__F - gastrodermis 9. The epidermis lines the gastrovascular cavity of cnidarians.
_T_____________ 10. Both hydra and sponges reproduce asexually by budding.
_T_____________ 11. The phylum Scyphozoa sting and paralyze their prey.
_F – jellylike_____ 12. Mesoglea is a cellular layer in both sponges and cnidarians.
__T____________ 13. Both choanocytes and amebocytes help get food for sponges.
_F- only polyps__ 14. Anthozoans live their lives as both polyps and medusae.
F – polyp or bottom15. Medusa form cnidarians have their mouth located on the top.
_F – stand upward 16. Polyps have tentacles that hang downward.
_F - Ctenophora__ 17. Box jellies produce their own light by bioluminescence.
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Complete the following table for cnidarians.
Classes of
Cnidarians
Scyphozoa
Hydrozoa
Anthozoa
MEMBERS SYMMETRY BODY
FORM(S)
Jellyfish Radial
Hydras
Port.-man
of War
Sea anemones
Corals
Radial
4
Polyps –
young
Medusa -
adult
Polyp
Colony of
polyp &
medusa
UNIQUE
CHARACTERISTIC(S)
Resemble upside down
“cups”
bell-shaped
Can be found in
freshwater
Radial Polyps Resemble “flowers”