Figure CO 7. Simple, multicellular animals No organs or true tissues Asymmetrical Filter feeders.

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Presentation transcript:

Figure CO 7

Simple, multicellular animals No organs or true tissues Asymmetrical Filter feeders

Types of cells in sponges

Water flow through a sponge

Reproduction in sponges

Reproduction in Sponges Asexual Budding Gemmules (packets of cells in a resistant coating Sexual reproduction Hermaphroditic Sperm or eggs released at any time/sponge Internal fertilization Ciliated larvae produced that swim in water Settle on hard surface and create new sponge

The carnivorous “velcro” sponge (Family Cladorhizidae)

Hermit crab sponges

Hermit crab sponges reproduce with gemmules, spore-like structures, resistant to being dried out. Hermit crabs prefer shells without sponges on them.

“Boring sponge” on a scallop shell. Major decomposer of calcium carbonate in ocean.

Phylum Cnidaria Nematocysts (stinging cells) Radial symmetry Polyp and medusa form Reproduce Asexually (budding) or Sexually (sperm and eggs) Planula larvae metamorphoses into adult form.

Phylum Cnidaria Feeding carnivorous (use nematocysts) and/or photosynthetic (corals, anemones) cells contain zooxanthellae, symbiotic algae in the phylum Dinoflagellates

Phylum Cnidaria 4 major groups: Anthozoans (corals, anemones, sea pens) Hydrozoans (siphonophores, hydroids, fire corals, many medusae) Cubozoa (box jellyfish) Scyphozoa (Jellyfish)

Figure 7.5

Phylum Cnidaria Hydroids - Siphonophores (above) (portuguese man-o-war) - Feathery hydroids (picture at right) Polyp form is dominant.

Phylum Cnidaria Box Jellyfish (Class Cubozoa)

Phylum Cnidaria: Jellyfish (medusa form only)

Phylum Cnidaria: Anthozoans corals and anemones, anemone shown above) (polyp form is dominant)

Phylum Cnidaria: Anthozoans (corals and anemones, coral shown above) (polyp form is dominant)

Figure 14.24

Figure 14.25

Figure 14.26

Figure 7.11

Phylum Annelida (segmented worms) Most marine annelids are polychaetes

Polychaetes living in tubes “tube worms”

Living polychaete

Feeding modes

Figure 7.29

Snail and radula

Figure 7.21d

Figure 7.20

Figure 7.25

Figure 7.24

Phylum Mollusca Snails and limpets (Gastropods) Mussels, clams, scallops, oysters (Bivalves) Octopus, squid, cuttlefish (Cephalopods) Chitons (Polyplacophora)

What are 3 examples of radially-symmetric animals that live in the sea?

What are 3 examples of radially-symmetric animals that live in the sea? What is an example of a radially-symmetric animal that lives on land?

What are 3 examples of filter-feeding animals that live in the sea?

What are 3 examples of filter-feeding animals that live in the sea? What do they eat?

What are 3 examples of filter-feeding animals that live in the sea? What do they eat? What is an example of a filter feeding animal that lives on land?