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Sponges Cnidaria FeedingSymmetry Scientific/ Common Name 10 Point 20 Points 30 Points 40 Points 50 Points 10 Point 20 Points 30 Points 40 Points 50 Points 30 Points 40 Points 50 Points Marine Worms

Sponges are included in this Phylum.

Porifera

Scientific term used to describe movement in sponges

Sessile

This is the part of the sponge where digestion and circulation take place.

Atrium

Two defenses sponges use to deter predators

Toxins & Spicules

This organism forms a symbiotic relationship with sponges.

Cyanobacteria

These stinging organelles are found in Cnidocytes.

Nematocysts

This Cnidarian class includes what is considered the most poisonous animal on Earth.

Cubozoa

This digestive space is found in Cnidarians.

Gastro-vascular cavity

Planktonic form of a Cnidarian’s life cycle (tentacles point down)

Medusa

Class of Cnidarian whose organisms live in colonies of specialized polyps

Hydrozoa

Marine worms use this “water skeleton” for support

Hydrostatic Skeleton

Two ecological roles of marine worms

Absorb nutrients too small to be absorbed by others, prey, habitat, parasites

This phylum contributes more organisms to Earth than any other phylum of worm.

Nematodes (roundworms)

Common name for Chaetognatha

Arrow Worms

Ectoprocta, Phoronida, and Brachiopoda all bear this unique feature

lophophore

This type of feeding involves the consumption of microscopic organisms found in ocean water.

Suspension/filter Feeding

Sponges get their food using this technique.

Filter/Suspension Feeding

This is the main predator that specializes in feeding on sponges.

Hawksbill Sea Turtle

Besides filter/suspension feeding, Cnidarians exhibit this type of feeding.

Carniverous Predatorial

Name two types of feeding exhibited by marine worms.

Deposit feeding, Carniverous, Suspension feeding

This refers to having “no” symmetry.

Asymmetrical

Cnidarians exhibit this type of symmetry.

Radial Symmetry

Sponges exhibit this type of symmetry.

Asymmetry

Marine worms exhibit this type of symmetry.

Bilateral symmetry

This is the advantage of radial symmetry.

Being able to approach environment equally from all sides

Platyhelminthes

Flat worms

Portuguese man o’ war, fire coral…etc.

Hydrozoa

True Jellyfish

Scyphozoa

Nematodes

Roundworms

Phoronida

Burrowing worms

Make your wager

These flagellated cells in a sponge’s atrium are responsible for circulating water and filter feeding

Choanocytes