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BS1007 Cairns > Agnatha > Flashcards

Agnatha Flashcards

1
Q

The notochord functions primarily for

A

structural support

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2
Q

What is a long flexible rod fluid-filled cells encased in stiff, fibrous tissue

A. dorsal nerve chord
B. notochord
C. Pharyngeal slits
D. Post Anal Tail

A

b notochord

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3
Q

Hollow dorsal nerve cord:

A. largely reduced in adults
B. develops into the CNS, brain and spinal chord
C. flexible rod with stiff, fibrous tissue
D. swimming in species retain it

A

b

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4
Q

Series of pouches separated by grooves on sides of pharynx describes?

A

pharyengeal slits

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5
Q

____ develops into ear, neck, and other modified structures

A

pharengyeal slits

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6
Q

Hemichordates are:

A. carnivorous only
B. ominvourous
C. deposit feeders and detritus feeders
D. adults dont feed

A

c deposit feeders

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7
Q

Which characteristics do hemichordates share with chordates?

A. Pharyngeal gill slits
B. notochord
C. Post-anal tail
D. Hollow neural tube

A

A C D not B (notochord)

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8
Q

Hemichordates have a foregut pouch instead of a

A. Pharyngeal gill slits
B. notochord
C. Post-anal tail
D. Hollow neural tube

A

B notochord

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9
Q

Which group has a stomochord (foregut pouch)

A
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10
Q

The 3 body segments prosome, mesosome, metasome belong to which group?

A

hemichordates

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11
Q

What are the 3 body segments in a hemichordate?

A. anterior prosome, intermediate mesosome, posterior metasome
B. posterior prosome, intermediate mesosome, anterior metasome
C. intermediate prosome, intermediate mesosome, anterior metasome
D. anterior statochord, intermediate mesosome, posterior metasome

A

A. anterior prosome, intermediate mesosome, posterior metasome

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12
Q

Which are the 3 sub phyla of Chordates?

A. urochordates
B. vertebrates
C. cephalochordates
D. hemichordates

A

a b c

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13
Q

Which characteristics describes Urochordates:

A. sessile in adulthood
B. lack segmentation, notochord and nerve chord
C. use cilia lined pharnyx to trap food in muscous sheets
D. Secrete a tough tunic of cellulose

A

All of the above

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13
Q

Which characteristics describes Urochordates:

A. sessile in adulthood
B. lack segmentation, notochord and nerve chord
C. use cilia lined pharnyx to trap food in muscous sheets
D. Secrete a tough tunic of cellulose

A

All of the above

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14
Q

Which chordate phyla has an endostyle

A

urochordates

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15
Q

Adult urochordates are missing:

A. body cavity
B. segmentation
C. notochord
D. dorsal nerve chord

A

all of the above

16
Q

Which chordate larvae doesnt has a poorly developed gut and does not feed?

A

urochordates

17
Q

Which characteristics describes cephalochordates?

A. notochord in adulthood
B. myomeres
C. Has a cilia line the oral hood, pharynx and gill slits
D. adults don’t feed

A

A, B C

18
Q

Lancelets are scaleless, true or false?

A

true

19
Q

Lancelts and tunicates are vertebrates. True or false?

A

False - chordates

20
Q

In which chordate sub phyla does the Endostyle develops into thyroid gland?

A

vertebrates

21
Q

Vertebrates developed a new embryonic tissues called a ____ which gives rise to sensory and head structures

A

: neural crest

22
Q

Garstang’s (1928) hypothesis states:

A. Free swimming urochordate larva failed to metamorphose but developed adult features in larval stage
B. result from highly ancestoral larvae
C. are a sister group to cephalochordates
D. Retain primitive pattern of pre-vertebrate
condition

A
23
Q

Paedomorphosis is:

A, origin of vertebrates theory
B. disproves earliest vertebrate fossils including jawless ostracoderm fishes
C. The evolutionary process in which larval or juvenile features of an ancestral organism are displaced to the adult forms of its descendants.
D. Linked to the cephalochordate ancestral theory

A

C.

24
Q

Agnatha are _______ to extinct ostraoderms:

A. paraphyletic
B. monophelythic
C. polyphletyic
D. panophyletic

A

A. paraphleythic

25
Q

Agnatha characteristics:

A. Have no stomach
B. single atrium and single ventricle
C. Dorsal nerve cord with a differentiated brain
D. Have a notochord and dorsal nerve chord

A

All of the above

26
Q

Which vertebrate group has fins but no paired appendages?

A. Tunicates
B. Lancelets
C. Agnatha
D. Urochordates

A

C agantha

27
Q

Which group of vertebrates has a single atrium and single ventricle?

A

agantha

28
Q

Class Myxini and ___ belong to superclass Agnatha

A

Hyperoartia

29
Q

Myxini has a complete skeleton. True or False?

A

false

30
Q

Which vertebrate group attaches to food with toothed plates; use a rasping tongue?

A

agnatha

31
Q

Cartilaginous skull, but no vertebral column, but do have rudimentary vertebrae describes which class?

A

Myxini

32
Q

Class Hyperoartia are:

A. parasitic
B. have ammoceote larave
C. metamorphis
D. anadromous

A

All of the above

33
Q

ammocoetes larvae belongs to?

A

Class hyperoartia

34
Q

anadromous means?

A

birthed in freshwater and live adult life in marine environments

35
Q

Which agnatha class has complete cartilaginous skeleton?

A

Lampreys

BS1007 Cairns (22 decks)

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