Exam 3 BIOL 211 Iowa State – Biederman || Graded A+.
Deuterostomes are correct answers • bilaterally symmetrical
• Coelomate
• Blastopore fate (anus)
Blastopore Fate (anus) correct answers • Second opening in the gastrula becomes the mouth
Phylum Echinodermata classes correct answers • Sea stars
• Brittle stars
• Sea urchins
• Sand dollars
• Sea cucumbers
How many species of phylum echinodermata are there? correct answers 7,500 species (all
marine)
Adult Echinoderms correct answers Pentaradial (Starfish)
Cnidarians correct answers Radial symmetry (jellyfish)
Echinoderms have what kind of system correct answers Unique water vascular system
True or false: Dueterostomes are chordates? correct answers False
Echinoderms have a network of hydraulic canals used in correct answers • locomotion
• feeding
,• gas exchange
• excretion
Echinoderm Features correct answers • Muscle and nervous tissue, but no cephalization in adults
• No specialized respiratory, circulatory, or excretory systems
• Complete (but short) digestive system
Sea Stars correct answers keystone predators/ species - play a unique role in the ay ecosystems
function
Phylum Chordata correct answers This phylum includes the animals that are most familiar to us -
and includes humans
Phylum Chordata subphylum correct answers •Cephalochordate
• Urochordata
• Vertebraes
All chordates have four characteristics correct answers • Pharyngeal gills slits or pouches
• dorsal hollow nerve cord
• notochord
• post-anal tail
Pharyngeal slits or pouches correct answers Openings to the outside of the body at the
pharynx
Pharyngeal slits allow what correct answers Allows water that enters the mouth to exit without
passing though the gut in invertebrate chordates
, Dorsal hollow nerve cord correct answers Nerve cord develops into the central nervous system
(brain and spinal cord)
Notocord correct answers A flexible rod that supports a chordate's back
Muscular post-anal tail correct answers • tail that extends posteriorly to anus
• lost during embryonic development in may species
Subphylum Cephalochordata correct answers lancelets (blade like shape)
Lancelet anatomy correct answers Suspension feeders that use their pharyngeal slits to filter out
small food particles
Subphylum Urochordata correct answers tunicates, sea squirts
Adult tunicate features correct answers • no notochord
• no dorsal hollow nerve cord
• no post anal tail
Subphylum Vertebrates correct answers 63,000 named species of vertebraes
All vertebrae have the same characteristics as chordates, PLUS correct answers • pronounced
cephalization
• Vertebral column that encloses the nerve cord
• Endoskeletons that grow with the animal
Deuterostomes are correct answers • bilaterally symmetrical
• Coelomate
• Blastopore fate (anus)
Blastopore Fate (anus) correct answers • Second opening in the gastrula becomes the mouth
Phylum Echinodermata classes correct answers • Sea stars
• Brittle stars
• Sea urchins
• Sand dollars
• Sea cucumbers
How many species of phylum echinodermata are there? correct answers 7,500 species (all
marine)
Adult Echinoderms correct answers Pentaradial (Starfish)
Cnidarians correct answers Radial symmetry (jellyfish)
Echinoderms have what kind of system correct answers Unique water vascular system
True or false: Dueterostomes are chordates? correct answers False
Echinoderms have a network of hydraulic canals used in correct answers • locomotion
• feeding
,• gas exchange
• excretion
Echinoderm Features correct answers • Muscle and nervous tissue, but no cephalization in adults
• No specialized respiratory, circulatory, or excretory systems
• Complete (but short) digestive system
Sea Stars correct answers keystone predators/ species - play a unique role in the ay ecosystems
function
Phylum Chordata correct answers This phylum includes the animals that are most familiar to us -
and includes humans
Phylum Chordata subphylum correct answers •Cephalochordate
• Urochordata
• Vertebraes
All chordates have four characteristics correct answers • Pharyngeal gills slits or pouches
• dorsal hollow nerve cord
• notochord
• post-anal tail
Pharyngeal slits or pouches correct answers Openings to the outside of the body at the
pharynx
Pharyngeal slits allow what correct answers Allows water that enters the mouth to exit without
passing though the gut in invertebrate chordates
, Dorsal hollow nerve cord correct answers Nerve cord develops into the central nervous system
(brain and spinal cord)
Notocord correct answers A flexible rod that supports a chordate's back
Muscular post-anal tail correct answers • tail that extends posteriorly to anus
• lost during embryonic development in may species
Subphylum Cephalochordata correct answers lancelets (blade like shape)
Lancelet anatomy correct answers Suspension feeders that use their pharyngeal slits to filter out
small food particles
Subphylum Urochordata correct answers tunicates, sea squirts
Adult tunicate features correct answers • no notochord
• no dorsal hollow nerve cord
• no post anal tail
Subphylum Vertebrates correct answers 63,000 named species of vertebraes
All vertebrae have the same characteristics as chordates, PLUS correct answers • pronounced
cephalization
• Vertebral column that encloses the nerve cord
• Endoskeletons that grow with the animal
