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Zoology Lecture Unit 2 > Phylum Cnidaria > Flashcards

Phylum Cnidaria Flashcards

1
Q

Cnidaria examples

A

Anemones, jellies, coral

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2
Q

Cnidaria germ layers?

A

Diploblastic

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3
Q

Cnidaria ectoderm is

A

Epidermis

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4
Q

Cnidaria Endoderm

A

Gastrodermis

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5
Q

What is between the Cnidaria ectoderm and Endoderm?

A

Mesoglea

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6
Q

Parts of Cnidaria

Incomplete digestive tract path

A

mouth -> pharynx -> gastrovascular cavity

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7
Q

Cnidaria feeding mechanism

A

Filter/suspension feeding

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8
Q

How do Cnidaria breathe and excrete?

A

Every cell has access to water to do its own gas exchange and diffusion of metabolic waste

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9
Q

Where does Cnidaria keep water for hydrostatic skeleton

A

Water kept in the gastrovascular cavity

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10
Q

Cnidaria symmetry type

A

Radial symmetry

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11
Q

Cnidaria “No brain, no ganglion”

A

Cnidaria have a nerve network

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12
Q

Cnidaria synapomorphy

A

Cnidocytes

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13
Q

Cnidocyte purpose

A

Feeding and protection

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14
Q

Cnidocil purpose

A

trigger

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15
Q

Nematocyst

A

stinger (neurotoxins)

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16
Q

Cnidaria Barbs purpose

A

prevent prey from escaping

17
Q

Cnidaria Filament purpose

A

delivers toxin

18
Q

Cnidaria budding

A

offspring is developed

grows on parent and “hops off”

19
Q

Cnidaria fragmentation

A

Piece breaks off and regenerates the rest of the body

20
Q

Cnidaria

solitary or colony

A

Both, either / or

21
Q

Cnidaria are commonly mutualistic with ____

A

Zooxanthella

22
Q

2 Cnidaria body forms?

A

Polyp and medusa

23
Q

3 Cnidaria polyp characteristics

A

Sedentary
Thin mesoglea
tentacles “up”

24
Q

3 Cnidaria medusa characteristics

A

swimming
thick mesoglea
tentacles “down”

25
Q

Class Hydrozoa common name

A

Hydras

26
Q

Epidermal gonads

Colonial or solitary

A

Class Hydrozoa characteristics

27
Q

Sea anemones and corals

A

Class Anthozoa

28
Q

“antho” means

“zoa” means

A

flower; animal

29
Q

Dividers in Anthozoa gastrovascular cavity:

Septa are designed to

A

increase surface area of gastrodermis

30
Q

Anthozoa gonads are generated from ___

A

gastrodermis

31
Q

Anthozoa synapomorphy

A

Medusa is absent from entire class

32
Q

Class Scyphozoa common name

A

Jellies

33
Q

Scyphozoa life cycle

A

zygote -> planula (settles) -> scyphistoma -> strobila -(asexual reproduction)-> ephyra (from budding) -> adult medusa

34
Q

Cnidaria digestive tract type?

A

Incomplete digestive tract

35
Q

Cnidaria nervous system type?

A

Nerve network

36
Q

Cnidaria respiratory and excretory systems?

A

No specialized respiratory structures

No specialized excretory structures

Zoology Lecture Unit 2 (12 decks)

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