Unit 5 Flashcards
Have transient placenta
Marsupials
List the types of keratinized scales
Placoid (ancestral)
Ganoid (derived)
More derived
Ctenoid
Absent
CycloidViviparous and chorioallentoic
Eutheria
List functions of hair
Cryptic coloration Insulating Cooling Predator deterrence Temperature regulation
Midbrain is used in hearing (mesencephalon)
Anura (frogs)
What three groups are made up of fossil specimens only (no living representatives)
Ostracoderms
Placoderms
Acanthodia
Freshwater fish exhibit…
Hyperosmotic regulation
Fertilized eggs (with yolk) remain for a time with maternal parent
Ovovipary
Modifications in bone for hearing
Malleus
Stapes
Incus
Retemirable and oval are in what animals
Actinopterygii - ray finned dish
Extinct group of “fish” that are armored, vertebrates with articulated jaws derived from the first pair of gill arches.
Placoderms
What are the skull modifications in squamata
Loss of bones
Loose articulation of remaining bones
Have kinetic skulls
Squamata (snakes)
List some hair modifications
Vibrassae
Spines
Bristles
Awns
What group has motile non feeding larva and sessile feeding adults
Urochordata (tunicates)
Three types of caudal fins
Homocercal - rayfinned
Heterocercal - cartilaginous
Diphycercal - lobed finned
Characteristics of swimming
Body shape minimizes friction
Buoyancy means lower energy expedenture
Fin shape generates “lift”
What 3 terms describe the movements of fish in the water column
Pitch (up/down)
Roll
Yaw (side to side)
Grow continuously but never shed (fall off)
Horns
What Chordate features are present in Phylum Hemichordata
- Dorsal, hollow nerve chord
2. Pharyngeal gill slits
When the larval stage become precociously reproductive
Paedomirphosis
Characteristics of testudines
Loss of teeth
Ossified keratinized plates (pelvic/pectoral girdles)
Good vision and smell but poor hearing
Adjacent to swim bladder, transmits vibrations in actinopterygii
Webberian ossicles
Separates oral from nasal cavity to allow breathing and chewing simultaneously
Secondary palate
Has cartilaginous endoskeleton
Chondricthyes
Extinct group of “fish” that are jawless, armored, vertebrates
Ostracoderms
List in order the groups that lead up to the mammals
Synapsids—–>Therapsids—–>Cynidonts—–>Mammalian
What terms are used to describe the three styles of candle fins
- Homocercal (bony fish)
- Heterocercal (cartilaginous fish/sharks)
- Diphycercal (lobed finned fish)
Fertilized eggs (invested with yolk) mature/develop away from maternal parents
Ovipary
Has no ossified endoskeleton
Cephalospidomorphi
Extinct group of “fish” that are jawed vertebrates with dermal structures that resemble denticles seen in modern day sharks.
Acanthodia
Where are turbinate bones located
Nasal cavity
Have chromatophores
Anura (frogs)
Ectothermic with behavioral adjustments to maintain body temp
Squamata
Group that has slime glands
Myxini
What features allow sharks to swim
Constant swimming
Fatty deposits
Lateral line (sensory organs)
Aves skeletal modifications
Fusion of bones - pygostyle and synsacrum
Loss of teeth
Modified digestion
Respiration - one lung with anterior/posterior air sacs
What are the 5 Chordate features
- Notochord
- Pharyngeal gill slits
- Dorsal, hollow nerve chord
- Post anal tail
- Endostyle
