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Comparative Zoology > Lecture 4 - Phyla Cnidaria and Ctenophora > Flashcards

Lecture 4 - Phyla Cnidaria and Ctenophora Flashcards

1
Q

What is the largest traditional class of Cnidaria?

A

Anthoza

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2
Q

What is the most variable traditional class of Cnidaria?

A

Hydrozoa

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3
Q

What is the “stinging organelle” present in Cnidocytes known as?

A

Nematocytes

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4
Q

What are the 2 types of Cnidarian body shapes?

A
  1. Polyps
  2. Medusae
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5
Q

What is the traditional class of jellies known as “true jellies”?

A

Scyphozoa

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6
Q

Marine animals characterized by specialized cells which contain stinging structures.

A

Cnidarians

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7
Q

What are Nematocytes?

A

stinging organelles present in Cnidaria

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8
Q

Marine animals known as comb jellies, with rows of cilia used for swimming

A

Ctenophores

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9
Q

Organisms with two primary layers of cells - ectoderm and endoderm

A

Diploblastic

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10
Q

Organisms with three primary cell layers - ectoderm, mesoderm, and endoderm

A

Triploblastic

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11
Q

What is the difference between the two life forms of Cnidaria ; Polyps and Medusae?

A

Polyps are immobile (or sessile), cylindrical, and attached to a surface
and Medusae are free-swimming, and umbrella shaped.

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12
Q

Radial Symmetry entails what?

A

parts radiate from a central axis

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13
Q

Biradial Symmetry entails what?

A

combination of bilateral (regular) symmetry and radial symmetry

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14
Q

Which of the Cnidarian life forms is umbrella shaped?

A

Medusae

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15
Q

Which of the Cnidarian life forms is Cylindrical?

A

Polyps

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16
Q

True or False: The general life cycle of Cnidaria includes both sexual and asexual reproduction?

17
Q

What is meant by Dioecious?

A

having the male and female reproductive organs in separate individuals

18
Q

What are the 2 newer classes of Cnidaria?

A

Staurozoa and Myxozoa

18
Q

Which of the traditional classes of Cnidaria, includes variable life forms, some of which being marine?

19
Q

What is a typical example of a Hydrozoa Cnidaria?

A

Colonial Obelia

20
Q

In Colonial Obelia, Hydrorhiza is characterized as what?

A

a root-like structure for attachment/anchoring

21
Q

In Colonial Obelia, Zooids are characterized as what?

A

specialized individuals ; either hydranths - feeding zooids
or gonangium - reproductive zooids

22
Q

What are the stem-like parts of Colonial Obelia that extend from the Hydrorhiza?

A

Hydrocaulus / Hydrocauli

23
Q

What is the living tissue within the Hydrocaulus?

24
Q

What is the non-living outer covering that surrounds the Hydrocaulus?

Comparative Zoology (17 decks)

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