Phyla Porifera
What type of symmetry do porifera have?
NONE
Cnidaria have organelles called ____ that entangle, sting, or adhere to prey
Cnidae
The stinging cnidae are called nematocysts
Platyhelminthes are under the group of Lophotrochozoans, they exhibit mosaic cleavage, which type of cell fate determination do they have?
Cytoplasmic specification
Are molluscs coelomates?
YES
____: repeated body units, each often containing similar organs
metamerism
What type of nervous system does porifera have?
NONE
Name the class:
___ true jellies
____ medusa posses a velum
____ sessile with no medusa stage
_____ highly toxic with highly developed eyes
Scyphozoans
Hydrozoa
Anthozoa
Cubozoa
What do platyhelminthes use for water and ion regulation (for filtration and secretion)
Protonephridia
The cilia on the gills generate water currents for filter feeding and gas exchange, in what direction does the water flow to maximize gas exchange?
countercurrent
the ___ ____ pumps blood to the front of the body, delivering it to the aortic arches
dorsal aorta
____ cells move water with a flagellum surrounded by microvilli, this aids in feeding
collar cells/choanocytes
The ___ form is the floating, sexual reproductive, dioecious stage
Where as the ____ form is the hydroid, sessile, and asexual reproductive stage
medusa
polyp
Class Trematoda has an indirect development that requires 2 hosts. What are the sexual and asexual hosts?
1. sexual -> definitive hosts, VERTEBRATES
2. asexual -> intermediate hosts, MOLLUSC
What do mollusks use for filtration/secretion?
Metanephridia- filter coelomic fluid using a ciliated funnel called a nephrostome to remove nitrogenous waste
What is the annelid extretory system?
Metanephridia
What are the two ways porifera asexually reporoduce?
Can sponges reproduce sexually?
1. fragmentation
2. gemmulation (formation of gemmules)
3. Yes
Cnidaria lack true muscles but instead have ______ cells
epitheliomuscular cells
What are the definitive and intermediate host of class cestoda: taenia solium?
intermediate= pork
Which class undergoes torsion as larvae?
Which class lack setae and septae, are predatory/parasitic and have anterior AND posterior brains
Class Hirudinida
What supports the theory of shared ancestry between metazoans and the choanoflagellates?
HOX Genes in choanoflagellates
Name 3 differences between Cnidaria and Ctenophores
Ctenophores have a complete cut, true muscle cells, use cilia to move, no cnidocytes
Which platyhelminthes class includes all free living flatworms?
Which class has closed circulation with a systemic heart and brachial hearts?
class cephalopod
Which "class" has parapodia?
Polychaeta