Deuterostomes Flashcards
Which of the following is NOT a characteristic of a deuterostome? Largest-bodied, morphologically complex, gut develops from posterior-to-anterior, coelom develops from outpockets of the ectoderm.
Coelom develops from outpockets of the MESODERM.
What 3 lineages did we study for deuterostomes? Echino____, hemi_____, and chordata.
Echinodermata , hemi-chordata, and chordata.
Echinoderms have a ___ sided radial symmetry.
5
Echinoderms have a ____ vascular system.
water
What kind of feet do echinoderms have?
tube feet
Name some examples of an echinoderm.
Sand dollars, sea urchins/stars/cucumbers/lilies
While echinoderm larvae have ____ symmetry, the adults have radial symmetry.
bilateral
Echinoderms also have an ____skeleton.
exo
Acorn worms are considered to be in what lineage of deuterostomes.
Hemi-chordata
Which feature is NOT characteristic of Hemi-chordata? They lack notochord and post-natal tail, they have echinoderm-like larvae, they have DT nerve chord, they don’t have pharyngeal slits.
They DO have pharyngeal slits.
Hemi-chordata are considered _____ which means that they live on the bottom of the ocean and feed on organic matter.
Benthic
Phylum Chordata all have a notochord, dorsal (hollow) nerve chord, ______ slits, and _____ tail.
pharyngeal, post-natal
Pharyngeal slits could be ____ or _____.
gills, pouches
The tail extends past the ____, and the dorsal nerve chord expands anteriorly for the ______.
anus, brain
Human embryo’s have all four Chordata features, but the tail almost ______.
disappears
The leftover portion of the tail might be considered the _____.
Coccyx
There are ____ chordates and _____ chordates.
invertebrate, vertebrate
Name some invertebrate chordates. _____chordata (lancelets) and uro________ (tunicates).
Cephalochordata, urochordata
Lancelets are _____ feeders and fish-like.
filter
________ larvae are motile while the adults are sessile. Adults lose ________ and notochord.
Tunicate, tail
Vertebrate chordates have either bone or cartilage body-support that protects the ______chord (spinal).
nerve
Endoskeleton adaptation: paired ______ (fins, legs, wings), increase in size, and complexity of ______ organs.
appendages, sensory
Name one extinct JAWLESS fish.
Ostracoderm
One class of EXTANT jawless fish is the group….
Petromyzontoidea (petro-myzon-toidea)
Gnathostomes are _____ fish. Its classes are placodermi (extinct) and two others: ______ichthyes (sharkes, skates, rays, etc.) and ____ichthyes (ray-finned, lobe-finned).
Jawed, Chondrichthyes, Osteichthyes
Chondrichthyes have a _____ skeleton.
cartilaginous
True/False: Ray-finned (actinopterygii) lack the humerus bone.
TRUE
What is the sub-class for lobe-finned fish.
Sarcopterygii
The lobe-finned fish are in the _____ to amphibians, and do have a ____ bone. A ____ fish is an example of a Sacropterygii.
lineage, humerus, lung
Name three animals in class amphibia…
frogs, toads, salamanders
Amphibians have whats called a “____ life” and undergo metamorphosis.
double life
Amphibian larvae have _____, the adults have ____, and are ____thermic.
gills, lungs, ecto
Reptiles have scales made of ______.
keratin
Name some animals in class Reptilia.
crocodrilians, turtles, lizards, snakes, etc.
Reptiles are ____thermic.
ecto
True/False. Reptiles have lungs.
TRUE
Draw the amniotic egg.
Make sure you included all features (embryo, yolk, allantois, chorion)
The yolk provides the embryo with _____.
nutrients
The allantois is for ______.
waste
The chorion is for ____ exchange.
gas
Albumen in the amniotic egg has ____ for support.
water
Class Reptilia and _____ both use an amniotic egg.
Aves
Birds in class Aves have feathers made of _____, wings, and are ______ thermic.
keratin, endo
In class Mammalia, hair (or fur) is made of _______. Animals have _____ glands, and are _____ thermic.
keratin, mammary, endo
Name the sub-classes of Mammalia: pro_____, meta_____ and ____theria.
protheria, metatheria and eutheria
Rodentia, Carnivora, Cetacea, Lagomorpha and Primates are all under the subclass __________.
Eutheria
Name one transitional species between fish and amphibians.
Tiktaalik
True/False: Deuterostomes share key features of embryonic development.
True
True/False: The coelom is found in all deuterostome animals.
True
Chordates are defined by the presence of four morphological traits: pharyngeal gill slits, a ______ cord, a notochord, and a post-anal tail.
Nerve
True/False: The arrangement of bones and the fins of lobe-finned fishes and the limbs of tetrapods is similar.
True
What two features are possessed by all vertebrates at some point in their life?
Tail, cranium (sensory organ)
Name a JAWLESS fish
Lampreys, hagfish
True/False: Reptile skin is made watertight by a layer of scales made of Keratin.
True
