Animal Diversity 2 Flashcards by chiamaka okudo

Q

2 phyla classified under basal animals

A

Phylum Porifera and phylum cnidaria

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Q

How do porifera and cnidaria differ in symmetry

A

Porifera have no symmetry

Cnidaria have radial symmetry

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Q

Specialized cells in porifera

A

Choanocytes (collar cells)

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Q

What are Choanocytes used for

A

feeding

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Q

Specialized cells for cnidaria

A

Cnidocytes

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Q

Cnidocytes are..?

A

stinging cells

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Q

Shared derived traits of bilateria

A

Bilateral symmetry

Triploblasty

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Q

2 major groups of bilateria

A

Protostomes

Deuterostomes

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Q

Spiral is a…

A

clade

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Q

Phyla in the spiral clade

A

Platyhelminthes

Rotifera

Mollusca

Annelida

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Q

Platyhelminthes derived traits

A

Flat body shape

Acoelomate

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Q

Derived trait of rotifer

A

Corona (crown of cilia)

Pseudoceolomate

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Q

Mollusca derived traits

A

Mantle

Visceral mass

Foot

Radula

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Q

Porifera means…

A

to have holes

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Q

Porifera include

A

sponges

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Q

Porifera have no

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A

symmetry, tissue, or organs

Q

Cnidaria have

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A

tissue, radial symmetry, & diploblast

Q

Ecdysozoa clade derived trait

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A

Ecdysis

Q

Ecdysis means

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A

molting

Q

Phylum in ecdysozoa

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A

Nematoda & arthropoda

Q

Nematoda shared derived traits

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A

pseudoceolomate
body covered in cuticle

Q

Arthropoda shared derived trait

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A

Tagmata

Chitinous exoskeleton

Q

Tagmata means…

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A

Specialized segments

Q

Function of exoskeleton

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A

Protection

Prevent desiccation

Muscle attachment

Costs of exoskeleton

Limit# growth and size