Platyhelminthes

Question 1

Bilateria

Answer 1

Large clade that contains almost all tripoblastic animals

Question 2

Bilaterian animals

Answer 2

2 Clades:
Protostomes
Deuterostomes

Question 3

Protostomes

Answer 3

Platyhelminthes
Annelida
Mollusca
Nematoda
Arthopoda

Question 4

Deuterostomes include:

Answer 4

Echinodermata
Chordata

Question 5

Bilateria clades

Answer 5

Lophotrochozoa
Ecdysozoa
Deuterstomia

Question 6

Lophotrochozoa

Answer 6

Protostome taxon that possess either a lophophore or a trochophore larva

Question 7

Lophophore

Answer 7

Crown of ciliated tentacles found near the mouth - Used for feeding and respiration

Question 8

Trochophore

Answer 8

Free swimming larva with a ring of large ciliated cells in front of the mouth

Question 9

Uses of trochophore

Answer 9

Locomotion but can be used in feeding
Annelids and molluscs have a trochophore larva

Question 10

DNA and RNA sequence data support their placement in the clade

Answer 10

Some taxa within Lophotrochozoa lack both a lophophore and a trochophore

Question 11

Platyhlemnithes (flatworms)

Answer 11

Free-living and parasitic species

Most free-living flatworms are aquatic; terrestrial flatworms are limited to moist areas

Question 12

Platyhelminth chracteristics

Answer 12

Dorsoventrally flattened bodies
Acoelomate (no body cavity)

Question 13

Many parasitic flatworms have more than one host organism

Answer 13

The first host is usually an invertebrate while the final host is usually a vertebrate

Question 14

Debate on the validity of this phylum

Answer 14

No clear defining feature found across all members of the phylum

The phylum is shown to be monophyletic when molecular dat is analyzed