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Biology > 9 Major Animal Phyla > Flashcards

9 Major Animal Phyla Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

These organisms differ from Chordates in terms of embryonic development. They exhibit spiral cleavage.

A

Protostomes

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2
Q

Incomplete digestive system, radial symmetry

A

Cnidaria

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2
Q

This phylum has an asymetrical appearance

A

Porifera

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3
Q

Internal, Limy skeleton

A

Echinodermata

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4
Q

complete digestive system, water-vascular system

A

Echinodermata

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4
Q

The Class Cephalopoda is a part of which Phylum?

A

Mollusca

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5
Q

T/F: All Molluscs have a hard, external shell

A

False

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6
Q

insecta, crustacea, arachnida

A

Arthropoda

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7
Q

T/F: Octopi and squids are considered molluscs, but they have 8 “feet.”

A

False. Octopi and Squid have multiple tentacles, and one “head-foot.”

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8
Q

Gastropods

A

Mollusca

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9
Q

These two phyla both have radial symmetry

A

Cnidaria, Echinodermata

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10
Q

unsegmented, complete digestive system, pseudocoelomate

A

Nematoda

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11
Q

paired, jointed appendages

A

Arthropoda

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12
Q

Sessile feeders

A

Porifera

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12
Q

Earthworms

A

Annelida

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14
Q

nematocysts are a characteristic of this Animal Phylum

A

Cnidaria

16
Q

roundworms

A

Nematoda

18
Q

One stage of ths phyla’s life cycle is called a medusa

A

Cnidaria

19
Q

unsegmented, one muscular foot

A

Mollusca

20
Q

flatworms

A

Platyhelminthes

21
Q

no distinguishable germ layers

A

Porifera

21
Q

Coelomate protosome, segmented body

A

Annelida

22
Q

T/F: Echinoderms have an internal digestive system.

A

False.

23
Q

chitin exoskeleton

A

Arthropoda

25
Q

Chordates and Echinoderms are examples of these coelomate organisms.

A

Deuterostomes

26
Q

incomplete digestive system, eyespots

A

Platyhelminthes

27
Q

T/F: All Chordates, Arthropods, and Annelids exhibit bilateral symmetry.

A

True.

28
Q

Dorsal Nerve Chord

A

Chordata

29
Q

Has a radula

A

Mollusca

30
Q

Notochord

A

Chordata

31
Q

Internal Hydrostatic skeleton

A

Annelida, Echinodermata

32
Q

“Exoskeleton” composed of calcium carbonate

A

Molluscs

33
Q

Elephantiasis can be caused by these

A

Nematodes

34
Q

Platyhelminthes use this. It extends through the mouth.

A

the Pharynx

35
Q

Which phyla contains hydra-like organisms with a digestive cavity and only one opening that serves as both the mouth and the anus?

A

Cnidaria

Biology (2 decks)

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