BIOL 112 Exam #4 (Final) Janes TAMU
Questions and All Correct Answers 2026
Updated.
Chordate Characteristics (ch29) - Answer Notochord
Dorsal Hollow Nerve Cord
Pharyngeal Gill Slits
Post Anal Tail
Endostyle
Notochord (ch29) - Answer flexible dorsal rod; used for support; endoskeleton works with
muscles for locomotion
develops into vertebral column
Dorsal Hollow Nerve Cord (ch29) - Answer tube forms from fold of ectoderm dorsal (above)
notochord
develops into spinal cord
Pharyngeal Gill Slits (ch29) - Answer filter feeding and gas exchange;
develops either into gills or lungs
Post-Anal Tail (ch29) - Answer A tail posterior to the anus; found in chordate embryos and
most adult chordates.
Cephalochordata (ch29) - Answer Lancelets
*all 4 chordate characteristics found in adult*
, burrowing filter feeder
cilia creates currents for food
Urochordata (ch29) - Answer *larval stage has all 4 characteristics*
Tunicates ("Sea Squirts")
Highly derived sessile adult; suspension feeder
Vertebrate Characteristics (ch29) - Answer 1. Vertebrae of cartilage/bone
2. well developed head
3. 2-4 chambered heart w/valves
4. gill arches/rods of cartilage or bones support gill slits
Cranium (ch29) - Answer Skull of cartilage or bone
holds brain
has paired sensory organs (eyes, nostrils, etc...)
Closed Circulatory System (ch29) - Answer A circulatory system in which the oxygen-carrying
blood cells never leave the blood vessels
Hemoglobin (ch29) - Answer In blood cells; helps carry oxygen; make ATP
Vein (ch29) - Answer Carries un-oxygenated blood to heart
Artery (ch29) - Answer carries oxygenated blood away from heart
Capillary (ch29) - Answer leaves/transfers oxygen to tissues
Questions and All Correct Answers 2026
Updated.
Chordate Characteristics (ch29) - Answer Notochord
Dorsal Hollow Nerve Cord
Pharyngeal Gill Slits
Post Anal Tail
Endostyle
Notochord (ch29) - Answer flexible dorsal rod; used for support; endoskeleton works with
muscles for locomotion
develops into vertebral column
Dorsal Hollow Nerve Cord (ch29) - Answer tube forms from fold of ectoderm dorsal (above)
notochord
develops into spinal cord
Pharyngeal Gill Slits (ch29) - Answer filter feeding and gas exchange;
develops either into gills or lungs
Post-Anal Tail (ch29) - Answer A tail posterior to the anus; found in chordate embryos and
most adult chordates.
Cephalochordata (ch29) - Answer Lancelets
*all 4 chordate characteristics found in adult*
, burrowing filter feeder
cilia creates currents for food
Urochordata (ch29) - Answer *larval stage has all 4 characteristics*
Tunicates ("Sea Squirts")
Highly derived sessile adult; suspension feeder
Vertebrate Characteristics (ch29) - Answer 1. Vertebrae of cartilage/bone
2. well developed head
3. 2-4 chambered heart w/valves
4. gill arches/rods of cartilage or bones support gill slits
Cranium (ch29) - Answer Skull of cartilage or bone
holds brain
has paired sensory organs (eyes, nostrils, etc...)
Closed Circulatory System (ch29) - Answer A circulatory system in which the oxygen-carrying
blood cells never leave the blood vessels
Hemoglobin (ch29) - Answer In blood cells; helps carry oxygen; make ATP
Vein (ch29) - Answer Carries un-oxygenated blood to heart
Artery (ch29) - Answer carries oxygenated blood away from heart
Capillary (ch29) - Answer leaves/transfers oxygen to tissues
