UNE Bio 2 Midterm Test Questions and
All Correct Answers.
parazoa and radiata - Answer parazoa=sponges
radiata = jellyfish and other radially symmertrical animals
phylum porfera - Answer SPONGES
-loosely organized, lack tissues
-only aquatic, mostly marine
-no apparent symmetry
-water drawn through pores into spongocoel and flows out via osculum
-reproduction:
*sexual=mostly hermaphrodites (sperm/eggs produced in same)
*asexual=small fragments or bud may dettach and form a new sponge
describe radiata - Answer -includes phylum cnidaria and Ctenophora
-radial symmetry
-diploblastic (2 germ layers with mesoglea= jelly substance in between them that connects
them)
-no brain but true nerve cells in a nerve net
-have a gastrovascular cavity for extracellular digestion (allows for ingestion of larger food
particles)
phylum cnidaria - Answer -2 different body forms:
1. sessile polyp (anommenie)
2. motile medusa (jellyfish)
-produce cnidocytes (=a type of cell) that contains nematocytes =what stings you
**all have these stinging cells
reproduction: sessiole polyp -> reproduce asexually by producing mesusae (free swimming) by
budding-these are male or female --> will then either release eggs and sperm --> undergo fert --
> eventually form free swimming larvae --> attach to a substrate and become a polyp
phylum ctenophora - Answer COMB JELLIES
-first complete gut (=both a mouth and an anus)
, -have eight rows of cilia on them that beat for propulsion
-hermaphroditic
-bioluminescent
-2 long stinging cells w/o stinging cells
characteristics of lophotrochozoa - Answer they have either:
a) lophophore = a crown of ciliated tentacles
b) trochophore = larval stage
** includes phylum platyhelminthes, mollluska, annelida
Phylum Platyhelminthes - Answer FLATWORMS
-lack a specialized respiratory & circ system (respire by diffusion)
-among first animals with predatory lifestyle
-bilaterally symmetrical with a head
-1st triploblast (=3 germ layers)
-accelomate =lacking a fluid filled cavity
BASIC BIOLOGY:
-incomplete digestive system
-have an excretory system with flame cells for filtering out waste
-have ocelli = light sensitive eyespots
-can do sexual or asexual reproduction
-have cerebral ganglia
phylum molluska - Answer -soft body, often with a shell
-often have a foot, visceral mass (contains all of their organs), and mantel
-have a coelum, confided to a small area around the heart
-open circ system
-has a radula=a unique tongue like organ
BASIC BIO:
-most shells have three layers that were laid down by the mantle
-mostly external fertilization
-trochophore larva develop into veliger = a specific type of larvae w/ a rudimentary foot, shell,
mantle
All Correct Answers.
parazoa and radiata - Answer parazoa=sponges
radiata = jellyfish and other radially symmertrical animals
phylum porfera - Answer SPONGES
-loosely organized, lack tissues
-only aquatic, mostly marine
-no apparent symmetry
-water drawn through pores into spongocoel and flows out via osculum
-reproduction:
*sexual=mostly hermaphrodites (sperm/eggs produced in same)
*asexual=small fragments or bud may dettach and form a new sponge
describe radiata - Answer -includes phylum cnidaria and Ctenophora
-radial symmetry
-diploblastic (2 germ layers with mesoglea= jelly substance in between them that connects
them)
-no brain but true nerve cells in a nerve net
-have a gastrovascular cavity for extracellular digestion (allows for ingestion of larger food
particles)
phylum cnidaria - Answer -2 different body forms:
1. sessile polyp (anommenie)
2. motile medusa (jellyfish)
-produce cnidocytes (=a type of cell) that contains nematocytes =what stings you
**all have these stinging cells
reproduction: sessiole polyp -> reproduce asexually by producing mesusae (free swimming) by
budding-these are male or female --> will then either release eggs and sperm --> undergo fert --
> eventually form free swimming larvae --> attach to a substrate and become a polyp
phylum ctenophora - Answer COMB JELLIES
-first complete gut (=both a mouth and an anus)
, -have eight rows of cilia on them that beat for propulsion
-hermaphroditic
-bioluminescent
-2 long stinging cells w/o stinging cells
characteristics of lophotrochozoa - Answer they have either:
a) lophophore = a crown of ciliated tentacles
b) trochophore = larval stage
** includes phylum platyhelminthes, mollluska, annelida
Phylum Platyhelminthes - Answer FLATWORMS
-lack a specialized respiratory & circ system (respire by diffusion)
-among first animals with predatory lifestyle
-bilaterally symmetrical with a head
-1st triploblast (=3 germ layers)
-accelomate =lacking a fluid filled cavity
BASIC BIOLOGY:
-incomplete digestive system
-have an excretory system with flame cells for filtering out waste
-have ocelli = light sensitive eyespots
-can do sexual or asexual reproduction
-have cerebral ganglia
phylum molluska - Answer -soft body, often with a shell
-often have a foot, visceral mass (contains all of their organs), and mantel
-have a coelum, confided to a small area around the heart
-open circ system
-has a radula=a unique tongue like organ
BASIC BIO:
-most shells have three layers that were laid down by the mantle
-mostly external fertilization
-trochophore larva develop into veliger = a specific type of larvae w/ a rudimentary foot, shell,
mantle
