Lab Terms Flashcards
(32 cards)
A taxon which forms a clade
consists of ancestral species and its descendants
Monophyletic group or clade
structure of a branching evolutionary tree
species that share recent common ancestry and have similar features,
phylogeny
Evolutionary trait that is unique to a particular species and all its descendants
Apomorphy
Two or more organisms possess a characteristic inherited exclusively from their common ancestor
Synapomorphy
A branching diagram showing the cladistic relationship between a number of species
Cladogram
A trait that appears by mutation
Derived trait
A trait that has been inherited
Ancestral
Animals that have three germ layers (Ectoderm, Mesoderm, Endoderm)
Triploblastic
Mouth First (most animals)
Protostome
Anus First (Echinoderms)
Deuterostome
Bipinnaria
First larval stage of Starfish (Echinoderms)
Crinoidea, Asteroidea, Ophiuroidea, Echinoidea, Holothuroidea
Echinoderm Classes
Echinoderm defensive organ
Pedicellaria
Calcified material that males part of an invertebrate skeleton.
Ossicles
- Dorsal hollow nerve chord
- Notochord
- Pharyngeal pouches (gill slits)
- Post-anal tail
- Endostyle
5 Chordate Hallmarks
One Temporal Fenestra
Synapsid
Two Temporal Fenestra
Diapsid
Muscle that passes under the Zygomatic Arch
Temporalis Muscle
Bone that passes under the eye socket
Zygomatic Arch
Part of skeleton that consists of bones of the head, trunk and vertebrae
Axial Skeleton
No Temporal Fenestra
Anapsid Skull
the name of the gap between the incisors and the premolars?
Diastema
The bone that forms the mandible
Dentary Bone
Comprises of Pelvic and Pectoral Girdles
Appendicular skeleton
