Sponges and Cnidarians Quiz
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41 terms
Terms | Definitions |
|---|---|
 Protostomes | form mouth first |
| Deuterostomes | forms mouth second |
| Perifera (sponges) | lack tissue; asymmetrical |
| Radical Symmetry | pass more than 1 plane through an axis to get a mirror image |
| Bilateral symmetry | pass one plane through central axis to get a mirror image. |
| Phylum Porifera | Sponges |
| Phylum Porifera- Hear? | Pore hearing |
| Phylum Porifera- transitions? | transitions from unicellular to multicellular |
| Phylum Porifera- Cell..? | Cell recognition (all animal cells) |
| Phylum Porifera- Resembles? | Plants |
| How does Phylum Porifera resemble a plant? | Sessile; grows in many shapes & sizes |
| Phylum Cnidaria | Stinging Cells |
| Phylum Cnidaria EXAMPLES? | Jellyfish, Hydra, Sea Anenomes |
| 4 Characteristics of the Phylum Cnidaria | 1. Sessile (anchors to a substrante) 2. Takes a Polyp shape 3. Separate sexes, but most are hermaphroditic 4. Nervous system |
| What is the Nervous system of Phylum Cnidaria | Nerve Net - They dont have a brain |
| 4 Classes in the Phylum Cnidaria and EXAMPLES in each. | Hydrozoa - Hydra Cubozoa - Box Jellyfish Anthozoa - Sea anenomes (flower cnidarians) & Coral Scyphozoa - Common Jellyfish (cup animals) |
| Explain the Life Cycle of a Jellyfish. | Egg and Sperm form together in water; zygote becomes a blastula which becomes a Planula; the Planula attachees itself to the ocean floor using its cilia; then becomes a Polyp; the Polyp produces multiple medusae; then young medusa are created |
| What is a Planula | larval stage of jellyfish and has cilia |
| What is a Polyp | Producer of medusa that develops the body shape and mouth |
| How does Phylum Porifera reproduce? (3 ways) | Asexually; Bud Formation. Some are freshwater. Gemmules and are created in harsh conditions. Regeneration; regenerates body parts when split Sexually; production of larva (some separate sexes, but most are hermaphroditic) |
| What are Gemmules? | Amoebocytes & Spicules |
| Phylum Porifera - body plan? | 2 layers of cells that are separated by mesohyl; Central cylinder (lined w/ flagella cells and collar cells) -> empty into Ostia, water leaves through the Oscuium and the top opening of the central cylinder |
| What is Mesohyl? | Jelly like substance that separates the 2 layers of the body plan in Phylum Porifera |
| What are Choanocytes? | Flagella Cells |
| Phylum Porifera - Structure | Spongin (proterin) and Spicules |
| Label the Medusa; from top to bottom. | epidermis Mesoglea Gastrovacular Cavity Gastrodermis tentacle mouth/anus |
| Label the Polyp; from top to bottom. | mouth/anus tentacle epidermis Mesoglea Gastrovacular Cavity Gastrodermis Basal Disk |
| Epidermis | outer layer of cells |
| Mesoglea | jelly like substance between the 2 layers- transports materials |
| Basal Disk | Anchors the organism |
| tentacle | used for feeding & protection; contains cnidocytes |
| Cnidocytes | stinging cells |
| Label the Hydra; top to bottom | Mouth/Anus Testes Ovary Sessile Basal Disk |
| Testes | form sperm |
| Ovary | produces eggs |
| Label the Nematocyst; left to right | trigger barb filament |
| trigger | when an enemy is close barbs pop out and sting |
| barb | paralyzes organisms |
| filament | wraps around the organism to get it entangled |
| How is the food digested in Nematocysts? | Goes into mouth, sits in gastrovacular cavity, gastrodermis secretes enzymes to breakdown the food, food is absorbed through the gastrodermis into the mesoglea |
| Sessile | Anchors the organism |
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