Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

ZOOL 250 lectures 13-28 > 28 > Flashcards

28 Flashcards

1
Q

Hemichordata placement

A

sister to Echinodermata

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Hemichordata

A

acorn worms, pterobranchs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Hemichordata spp

A

140

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Hemichordata habitat

A

entirely marine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Hemichordata body

A

tripartite body with eucoeloms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

whats used for feeding Hemichordata

A

pharyngeal slits

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

nervous system Hemichordata

A

dorsal and ventral nerve
cords

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

circ system hemichordata

A

heart and dorsal and ventral vessels, but the system is not completely closed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

sexes Hemichordata

A

seperate sexes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what kind of reproduction Hemichordata

A

both sexual and asexual

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

within Hemichordata

A

Enteropneusta
Pterobranchia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Enteropneusta

A

solitary
tripartite body plan

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

tripartite body plan of Enteropneusta

A

proboscis
collar
trunk- has gill’ slits

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what connects coelom to the water outside Enteropneusta

A

coelomopore

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what does each body region have Enteropneusta

A

own eucoelomic cavity or pair of cavities

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

similar to Cephalochordata Enteropneusta

A

pharyngeal slits that may be may be homologous with chordate branchial slits

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what does cilia on pharyngeal slits do Enteropneusta

A

generate current that sucks water through mouth and expels it through holes in pharynx to outside

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

proboscis is covered with
what is it used for? Enteropneusta

A

cilia and mucus and is used for feeding

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

where are desirable particles added? Enteropneusta

A

iodine-
rich mucus cord

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Enteropneusta feeding

A

nonselective deposit feeders that create large casts of
undigested sediment- ike eartyhworms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

where do enteropneusts live

A

some in burrows
others live on the surface of sediments

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

reproduction enteropneusts

A

asexually by multiple transverse fissions
and sexually via broadcast
spawning

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Pterobranchia habitat

A

tube-dwelling, colonial

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Pterobranchia body

A

tripartite

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
tripartite body of Pterobranchia
-cephalic shield -collar with 2-10 tentacle-bearing arms and pharyngeal slits -short globular trunk and stalk
26
what does each part of body havePterobranchia
or one two eucoelomic cavities
27
Pterobranchia how does zooid move up and down in tube
creeping movements of the cephalic shield
28
what do pterobranchs feed on
feed on suspended particles
29
gut pterobranchs
U-shaped
30
Pterobranchia reproduction
asexual via budding
31
ferilization in Pterobranchia
external fertilization and brooding
32
what are some pterobranchs fossiles known as
graptolites
33
graptolites
-all extinct now - were diverse -had planktonic colonies
34
Phylum Chordata
Vertebrata Cephalochordata and Urochordata
35
Phylum Chordata body cavity
coelomic cavity not tripartite and is reduced
36
what do pharyngeal slits/clefts do in chordata
-suspension-feeding devices in many invertebrate chordates -aquatic vertebrates are gill slits
37
Phylum Chordata features
-notochord -dorsal, hollow nerve cord -muscular, post-anal tail - pharyngeal slits/clefts -segmentally arranged muscle blocks
38
nerve cords in other animals are
solid and are almost always ventral
39
what is present in all chordate embryos
notochord
40
what does plate of ectoderm dorsal to notochord do
plate rolls into tube and develops into brain
41
what does endostyle do
secretes mucus and traps particles
41
what is present in Cephalochordata and Urochordata
endostyle
42
Urochordata and Vertebrata
are sister taxa
43
Cephalochordata
lancelets
44
adult Cephalochordata has
all the chordate character states
45
cephalo = head in cephalochordata why?
notochord extends anteriorly beyond the nerve cord
46
how do cephalochordata extract particles
mucous covered U-shaped pharyngeal slits
47
circulatory system Cephalochordata
closed
48
how is filtered water sent out of the body Cephalochordata
through atriopore
49
Cephalochordata endostyle
iodine-rich mucus net
50
Cephalochordata nervous system
dorsal nerve cord, no brain,
51
eye Cephalochordata
single non-image-forming eyespot
52
cephalochordata fertalization
external fertilization
53
cephalochodata sexes
seperate
54
larva in cephalochordata
plankatrophic for months
55
Urochordata spp
3000
56
Urochordata body covered in
tunic made of a cellulose-like polysaccharide
57
urochordata feeding And what do they use
suspension feeders with large branchial filtering baskets;
58
Urochordata solitary or colonial
both
59
Urochordata nervous system
no brain, dorsal nerve cord only in larvae and in adults of one class
60
Class Ascidiacea
part of urochordata
61
Class Ascidiacea nervous system
lack notochord & nerve cord as adults -their larva have it(tadpole)
62
Ascidiacea larvae
tadpole' larvae
63
pharynx of Urochordata
huge pharynx with many ciliated slits
64
what does endostyle do uropchordata
endostyle secretes an iodine-rich mucus net
65
where is water sent after filtering
water is sent to the atrial siphon
66
ascidians colonial or solitary
colonial share a single tunic, and are connected to each other by tissues
67
ascidians sexes
hermaphroditic
68
reproduction ascidians
asexually by budding
69
tadpole
tadpole larvae have brief free-swimming phase and then attach to substrate by head
70
Class Larvacea
part of urochordata
71
adults in larvacea
adults retain notochord and dorsal nerve cord and look rather like the tadpole larvae
72
Larvacea thought to have evolved via
paedogenesis
73
paedogenesis vs paedomorphosis
paedomorphosis: retention of juvenile characters in adults paedogenesis:sexual maturation while still in a juvenile or larval form) not much difference
74
what do larvaceans make to suspenstion feed
mucus houses
75
echinoderm larvae importance
food webs as prey and as predators
76
predation by sea stars structures
intertidal zonation
77
starfish wasting syndrome
mfs gettin fucked
78
invasive species of tunicates
fouling man-made objects and smothering native shit which blocked photosynthesis
79
echinoderms important models for
-studies of deuterostome- style development -larval cloning
80
E & I echinoderms
humans eat echinoderms -cephalochordates and urochordates

ZOOL 250 lectures 13-28 (18 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions