Ch. 26-28 Aquatic Invertebrates

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Cnidarian Life cycle: • Jellyfish are motile (medusa) as adults, but sessile (polyps) as juveniles. • Some hydra – sessile (polyps) as adults, motile (medusa) as juveniles.
C. Phylum Mollusca • Name origin: Latin word “molluscus”, meaning soft • Mollusks are soft-bodied animals that usually have an internal or external shell. • They are coelomates–they have a true body cavity (coelom) • Bilateral symmetry • A few mollusks are hermaphrodites – they have both male and female gonads. Usually, they do not fertilize themselves. • Gastropods, cephalopods, and bivalves all belong to the phylum mollusca.
Page 2 and 3: Learning objective: • For each of
Page 4 and 5: REPRODUCTION: • Asexual - budding
Page 6 and 7: STRUCTURE: • Sponges have spike-s
Page 8 and 9: Ping-pong tree sponge
Page 10 and 11: Name origin: • Cnidarians get the
Page 13: Reproduction in Cnidarians: • Sex
Page 17: 1. Class Cephalopoda • Name means
Page 21 and 22: 2. Class Gastropoda • Name means:
Page 23 and 24: 3. Class Bivalvia • Name means:
Page 25 and 26: D. Phylum Echinodermata • Name me
Page 27 and 28: Characteristics of echinoderms: •

Ch. 26-28 Aquatic Invertebrates

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