Invertebrates 1

Question 1

Phylum Porifera-Sponges

Answer 1

• Only type of animal to have cellular organization
• Saclike bodies perforated by many pores
• beating of flagella (choanocytes) produces water currents that flow through pores into central cavity and out the osculum
• sessile filter feeders
• Asexual reproduction by fragmentation or budding

Question 2

Asconoid

Answer 2

small, tube-shaped flagellated spongocel

Question 3

Syconoid

Answer 3

Tubular body, Flagellated canals

Question 4

Leuconoid

Answer 4

Most complex, largest. Large colonial masses. Flagellated Chambers

Question 5

Marine Natural Products

Answer 5

• Concerns disciplines of Orgo, biochem, pharmacology, bio, and ecology
• 12,000+ compounds isolated from marine sources
• secondary metabolites

Question 6

Phylum Cnidaria

Answer 6

Tubular animals that most often reside in shallow marine waters

polyp and medusa
stinging cells:cnidocytes
-fluid filled capsule, nematocyst
-Two layered body sac
   -Outer layer:protective epidermis
  -inner layer:gastrovascular
nerve net

Question 7

Cnidaria symmetry

Answer 7

radial

Question 8

Class Scyphozoa

Answer 8

Medusa, thick mesogela
Float in open sea
manubrium w/oral lobes
stomach w/ pouches
Sense organs = rhopalium       (statocyst+ocelli)
separate sexes

Question 9

class Cubozoa

Answer 9

sea wasp:venemous

Question 10

Class Hydrozoa

Answer 10

• Marine and freshwater
• a colony of polyps enclosed by a hard, chitinous covering
  - feeding polyps
  - extend far beyond covering
  - have nematocysts on tentacles
• can have sexual repro

Question 11

Class Anthozoa

Answer 11

• Polyp, no medusa
• sea anemonies, hard corals, sea fans
• large gastrovascular cavity w/ septa
• Ciliated groove: siphonoglyph
• Circular and Longitudinal muscles
• Attachment by pedal disc
• Pedal lasceration
• Potent nematocysts/Acontia
• Coral reefs -Hermatypic corals
  
  • Calcareous cups secreted by polyps (Zooanthellae)

Question 12

Coral requirements

Answer 12

warm, clear tropical waters and light salinity of normal seawater

Question 13

Phylum Ctenophora

comb jellies

Answer 13

• 8 comb rows called ctehes; covered by long cilia
• 2 long tentacles, colloblasts
• fragile, transparent body
• no nematocysts
• apical sense organ
• voracious appetite
• Bioluminescence