Vertebrates Crossword Puzzle

QUESTIONS LIST:

• notochord: a longitudinal, flexible rod between the digestive tube and nerve cord.
• pharynx: in most vertebrates, the pharyngeal slits open into the _ .
• cartilage: chondrichthyan skeletons are composed of _ .
• lancelets: names for their blade-like shape.
• posterior: the muscular, post-anal tail is _ to the anus.
• gnathostomes: vertebrates that have jaws.
• seasquirts: another name for tunicates.
• salamanders: ~550 species.
• osteichthyans: formal name for bony fish.
• brain: the central nervous system includes the _ and spinal cord.
• tunicates: group in which the larval characteristics may only last a few minutes.
• liver: the organ responsible for buoyancy in cartilaginous fish.
• tetrapods: gnathostomes with limbs.
• vertebrae: hagfishes and lampreys have rudimentary _ .
• vertebrates: chordates with backbones.
• dorsal: fins that function as stabilizers.
• amphibian: means “both ways of life”
• carnivorous: typical diet of salamanders and caecilians.
• paedomorphosis: the retention of larval features with sexually mature.
• operculum: the covering of gills in ray-finned fishes and lobe-fins.
• ovoviviparous: type of shark development in which eggs are retained within the oviduct.
• neuralcrest: gives rise to teeth, neurons, and sensory capsules.
• jaws: the main feature that hagfishes and lampreys lack.
• lampreys: parasites that clamp their mouths onto host fish.