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

Figure CO 7

Simple, multicellular animalsNo organs or true tissuesAsymmetricalFilter feeders

Types of cellsin sponges

Water flowthrough a sponge

Reproduction in sponges

Reproduction in Sponges

AsexualBuddingGemmules (packets of cells in a resistant coating

Sexual reproductionHermaphroditicSperm or eggs released at any time/spongeInternal fertilizationCiliated 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 CnidariaFeeding

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-symmetricanimals that live in the sea?

What are 3 examples of radially-symmetricanimals 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?