UVA BIOL 2200 Exam 3 Questions and Answers Already Passed
Porifera - Answers Basal Species
Porifera - Answers Have no true tissue/germ layer and just have cells
Porifera - Answers Ingest food and are filter feeders
Porifera - Answers Gas exchange and waste removal occurs by diffusion (oxygen coming in and waste
going out of cell membrane)
Porifera - Answers Can self-fertilize but choose to sexually reproduce and are hermaphrodites
Cnidaria - Answers Gastrovascular cavity w/ single-opening digestive system
Cnidaria - Answers Has sac w/ central digestive compartment
Cnidaria - Answers Polyp and Medusa phenotypes
Cnidaria - Answers Jellies and Jellyfish, alternate between sexual and asexual life stages
Cnidaria - Answers Radial Symmetry
Porifera - Answers Sessile while mobile at larvae stage
Porifera - Answers Asymmetric
Lophotrochozoa - Answers Some have ciliated feeding
Lophotrochozoa - Answers Share a distinct larvae shape
Lophotrochozoa - Answers This supergroup is best defined by DNA in the phylogenetic tree
Lophotrochozoa - Answers First group of bilaterians
Lophotrochozoa - Answers All share 3 germ layers and cephalization
Lophotrochozoa - Answers While most have, do not all share coelom or complete digestive tract
Flatworms - Answers Single-opening digestive system w/ dorsoventrally flattened body
Flatworms - Answers Despite being part a lophotrochozoan, still lacks complex organs and metabolic
processes are through diffusion
Flatworms - Answers Acoelomate Lophotrochozoans
Flatworms - Answers Lophotrochozoan with one opening in gastrovascular cavity w/ no circulatory
system
Planaria - Answers Free-living flatworms
, Planaria - Answers Hermaphroditic flatworms
Planaria - Answers Flatworms w/ light-sensitive eyespots
Planaria - Answers Flatworms that CAN reproduce asexually through fission (prefer cross-fertilization)
Tapeworms - Answers NON Free-living flatworms
Tapeworms - Answers Have suckers and absorb nutrients through body surface
Tapeworms - Answers Do not have gastrovascular cavity nor mouth
Molluscs - Answers 2nd phylum of lophotrochozoa, Blastopore becomes mouth
Molluscs - Answers Lophotrochozoans that live both in oceans and terrestrially
Molluscs - Answers Soft-bodied lophotrochozoans with calcium-carbonate shells
Molluscs - Answers Mostly non-hermaphroditic lophotrochozoans
Molluscs - Answers All coelomate lophotrochozoans
Molluscs - Answers Have feet
Molluscs - Answers Have visceral mass w/ internal organs and secrete CaCO3
Molluscs - Answers Have mantles which form a layer of tissue between shell and visceral mass and a
mantle cavity forming gills and anus
Molluscs - Answers Have radula which are curved teeth in feeding
Foot - Answers For movement
Visceral Mass - Answers Contains internal organs and secretes CaCO3
Mantle - Answers Layer of tissue between shell and visceral mass which forms gills and anus
Radula - Answers Curved teeth in feeding
Gastropods - Answers Include snails and slugs, some with single-spiral shells
Gastropods - Answers Have radula to cut holes, and scrape algae from rocks (vegetarians) or scrape
shells (predatory)
Gastropods - Answers Have heads with their eyes on tentacles
Gastropods - Answers Aquatic ones have gills w/ blood-like substances moving oxygen around
Gastropods - Answers Terrestrial ones have passive lungs w/ gas exchange occurring in the lining via
diffusion
Porifera - Answers Basal Species
Porifera - Answers Have no true tissue/germ layer and just have cells
Porifera - Answers Ingest food and are filter feeders
Porifera - Answers Gas exchange and waste removal occurs by diffusion (oxygen coming in and waste
going out of cell membrane)
Porifera - Answers Can self-fertilize but choose to sexually reproduce and are hermaphrodites
Cnidaria - Answers Gastrovascular cavity w/ single-opening digestive system
Cnidaria - Answers Has sac w/ central digestive compartment
Cnidaria - Answers Polyp and Medusa phenotypes
Cnidaria - Answers Jellies and Jellyfish, alternate between sexual and asexual life stages
Cnidaria - Answers Radial Symmetry
Porifera - Answers Sessile while mobile at larvae stage
Porifera - Answers Asymmetric
Lophotrochozoa - Answers Some have ciliated feeding
Lophotrochozoa - Answers Share a distinct larvae shape
Lophotrochozoa - Answers This supergroup is best defined by DNA in the phylogenetic tree
Lophotrochozoa - Answers First group of bilaterians
Lophotrochozoa - Answers All share 3 germ layers and cephalization
Lophotrochozoa - Answers While most have, do not all share coelom or complete digestive tract
Flatworms - Answers Single-opening digestive system w/ dorsoventrally flattened body
Flatworms - Answers Despite being part a lophotrochozoan, still lacks complex organs and metabolic
processes are through diffusion
Flatworms - Answers Acoelomate Lophotrochozoans
Flatworms - Answers Lophotrochozoan with one opening in gastrovascular cavity w/ no circulatory
system
Planaria - Answers Free-living flatworms
, Planaria - Answers Hermaphroditic flatworms
Planaria - Answers Flatworms w/ light-sensitive eyespots
Planaria - Answers Flatworms that CAN reproduce asexually through fission (prefer cross-fertilization)
Tapeworms - Answers NON Free-living flatworms
Tapeworms - Answers Have suckers and absorb nutrients through body surface
Tapeworms - Answers Do not have gastrovascular cavity nor mouth
Molluscs - Answers 2nd phylum of lophotrochozoa, Blastopore becomes mouth
Molluscs - Answers Lophotrochozoans that live both in oceans and terrestrially
Molluscs - Answers Soft-bodied lophotrochozoans with calcium-carbonate shells
Molluscs - Answers Mostly non-hermaphroditic lophotrochozoans
Molluscs - Answers All coelomate lophotrochozoans
Molluscs - Answers Have feet
Molluscs - Answers Have visceral mass w/ internal organs and secrete CaCO3
Molluscs - Answers Have mantles which form a layer of tissue between shell and visceral mass and a
mantle cavity forming gills and anus
Molluscs - Answers Have radula which are curved teeth in feeding
Foot - Answers For movement
Visceral Mass - Answers Contains internal organs and secretes CaCO3
Mantle - Answers Layer of tissue between shell and visceral mass which forms gills and anus
Radula - Answers Curved teeth in feeding
Gastropods - Answers Include snails and slugs, some with single-spiral shells
Gastropods - Answers Have radula to cut holes, and scrape algae from rocks (vegetarians) or scrape
shells (predatory)
Gastropods - Answers Have heads with their eyes on tentacles
Gastropods - Answers Aquatic ones have gills w/ blood-like substances moving oxygen around
Gastropods - Answers Terrestrial ones have passive lungs w/ gas exchange occurring in the lining via
diffusion
