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zoology > More for Chordata + Agnatha test > Flashcards

More for Chordata + Agnatha test Flashcards

1
Q

what is the function of the pineal organ?

A

light detector that helps set the lamprey’s biological clock

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2
Q

2 functions of buccal papillae

A

assist in forming water tight seal for attachment to objects & sensory

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3
Q

How adults Lampreys eat

A

eat fish by attaching to them and eating their flesh, blood + body fluids

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4
Q

How feeding habits of adult lamprey differ from larval stage?

A

Adult - attach to fish to eat their flesh
Larval stage - filter feed

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5
Q

How is cloaca different from anus

A

Anus - empties solid waste
Cloaca - empties gametes and digestive wastes

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6
Q

What is the function of the olfactory sac

A

sense of smell

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7
Q

What is the function of the lateral line system?

A

detect vibration

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8
Q

Phylum, subphylum, and class that includes hagfish

A

Chordata, Hyperotreti, Myxini

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9
Q

Phylum, subphylum, and class that includes lamprey

A

Chordata, Vertebrata, and Cephalaspidomorphi

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10
Q

What type of material makes up all agnathans

A

fiber and cartilage

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11
Q

What is the function of the endostyle

A

secretes mucus that traps food

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12
Q

What is the function of the notochord?

A

Structural support

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13
Q

What is the function of the Hepatic cecum

A

digestive gland that aid in digestion

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14
Q

What is the function of the myomere

A

interlocking muscles that allow for lateral movement

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15
Q

What is the function of the atriopore

A

allows water to exit the body

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16
Q

How reproduction in tunicates is different from lancelets

A

Tunicates = monoecious internal and external fertilization, Larva have all 5 chordata characteristics

Lancelets = dioecious, external fertilization, bilaterally symmetrical larva

17
Q

Similarities in tunicates and lancelets

A

-marine and filter feeders

18
Q

Differences in tunicates and lancelets

A

Tunicates lose notochord & tail as adult, have a ventral heart

Lancelets = retain all 5 chordate characteristics, no heart

19
Q

How do lampreys promote blood flow?

A

lampreys inject an anticoagulant into the wound

20
Q

What happens to non parasitic lampreys?

A

spawn and die after adulthood without ever feeding

21
Q

What do lampreys do in winter and spring

A

return to freshwater to breed in winter and spring

22
Q

What do male lampreys do?

A

build nests using oral discs to gather rocks

23
Q

what happens during lamprey egg laying

A

female attach to rock, male attach to dorsal side of female head during egg laying

24
Q

What are lamprey larva called?

A

Ammocoetes

25
Q

How long does larval stage for lampreys last

A

larval period from 3-7 years and rapidly metamorphosis into adult (spend majority of their life as larva)

26
Q

Hagfish do not have?

A

No larval stage

zoology (64 decks)

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