bio ch 32
Sharks that are __________ incubate their eggs within the mothers body
ovoviviparous
adult tunicates resemble ____ and are ____
sponges ; filter feeders
tunicates are ____ in phylum ____
urochordates ; chordata
what best describes vertebrates
vertebral column
the most unique feature of the echinoderms is their:
water vascular system
Order ____ includes the turtles and tortoises.
Testudines
Spiny echidnas are unlike other mammals in that they:
do not have nipples
echinoderms are related to chordates because the first opening to develop becomes the mouth
false- anus
the chordate nerve chord is hollow and located ventrally
false- dorsally
an exoskeleton is a characteristic of an echinoderm
false- endoskeleton
the earliest vertebrates had jaws
false- lacked
Echinoderms are characterized by bilateral symmetry in adults, a water vascular system, tube feet, and spiny skin.
false- radial
All echinoderms are found?
in marine habitats
Urochordates are odd chordates, as typically only the ____ show(s) the basic chordate characteristics.
larva
the monotremes are an unusual group of mammals bc they:
lay eggs
sea stars eat
mostly crustaceans and mollusks
Birds are most closely related to:
reptiles
in which group did the amniotic egg first evolve?
reptiles
which structure is used to help regulate buoyancy of fish?
swim ladder
Metamorphosis occurs in which of the following vertebrate classes?
Amphibia
which term can be applied to both monotremes and sharks?
oviparous
most reptiles are ____ and their fertilization is ____
oviparous ; internal
Within the chordate classes, the unique characteristic of the class Aves is:
feathers
what describes an animal that lays eggs?
oviparous
the first function of feathers was most likely:
as color displays in courtship rituals
salamanders are members of the order
caudata
the earliest mammals resembled small:
dogs
Hagfishes are differentiated from lampreys and all other fishes in that:
hagfishes lack vertebrae
order ____ includes snakes
squamata
what are living descendants of the dinosaurs?
birds
the Tetrpods include:
amphibians, reptiles, birds and mammals
Lancelets are?
filter feeders
Deuterostomes are characterized by ______ and ____ cleavage
radial and indeterminate
marsupials include the:
opossum
class _____ includes mostly extinct species and a few current species such as feathers stars and sea lilies
crinoidea
echinoderms are unique because:
their larvae are bilaterally symmetrical while the adult is pentaradially symmetrical
Mammals descended from a group of reptiles known as
therapsids
A fish with a cartilaginous skeleton and paired fins would be:
Chondrichthyes
Sea stars are
carnivores
Snakes are most closely related to
lizards