Exam (elaborations)
BIO 344 Week 1 (Intro And Chordates) Questions answers latest update
- Course
- Bio 344
- Institution
- University Of Texas - Austin
BIO 344 Week 1 (Intro And Chordates) Questions answers latest update
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BIO 344 Week 1 (Intro And Chordates)What are characteristics of Animalia? - eukaryotic,
multicellular,
heterotrophic organisms that develop from embryos
mobility at some point in their lives
have muscles and neurons
Blastula - hollow ball of cells
Proteostome vs deuterostome - - Proteostomes are when the blastphores
become the mouth and this is in invertebrates mostly
- deuterostomes form the anus first.
like starfish
Gastrulation - In animal development, a series of cell and tissue movements in
which the blastula-stage embryo folds inward, producing a three-layered embryo,
the gastrula.
What is a chordate? - an animal of the large phylum Chordata, comprising the
vertebrates together with the sea squirts and lancelets.
, what are the four characteristics of chordates? - Notochord - tough, flexible
structure that supports the cord
Dorsal, hollow nerve cord
Pharyngeal slits or clefts
Muscular, post-anal tail - lost in bipedal animals
Urochordates - A chordate without a backbone, commonly called a tunicate, a
sessile marine animal.
- larvae are free swimming
- adults are sessile filter feeders
- secrete an external coat of polysaccharides to maintain structure
- hermaphroditic reproduction
Cephalocordates - Small marine animals that burrow, tail first, into sand. This
way, they can draw food particles into their mouth via waving tentacles.
•Fusiform body plan - tapering at both ends
•Superficial resemblance to larval lampreys (ammocoete)
What are similarities that cephalocordata share with vertebrata? - •Myomeres -
muscles for movement
•Closed cardiovascular system
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