Protostome Coelomates

Question 0

What fraction of a platyhelminthe can regenerate into a whole animal?

Answer 0

1/300

Question 1

What are the characteristics of protostome coelomates?

Answer 1

Spiral cleavage
Determinate cleavage
Blastopore becomes mouth
Coelom is a fluid filled cavity lined with mesoderm

Question 2

How does a platyhelminthe regenerate?

Answer 2

A blastema forms over the wound, which then grows the missing part.

Question 3

What are the 4 main characteristics of the nemerteans?

Answer 3

Proboscis
Rhynocoel
Tube-within-a-tube body plan
Complete digestive tract

Question 4

What are the 5 advantages of a coelom?

Answer 4

Tube within a tube body plan is possible, allowing more intricate system
Hydrostatic skeleton
Provides space for the development or organs and gonads
Protects internal organs
Helps transport materials

Question 5

What is a trophore?

Answer 5

Ciliated larvae

Question 6

What is a lophophore?

Answer 6

Mouth

Question 7

What are the 2 main branches of protostome coelomates?

Answer 7

Lophotrochozoa

Ecdysozoa

Question 8

What are the 8 characteristics of platyhelminthes?

Answer 8

Acoelomate
Bilateral
Cephalization
Triploblastic
Well developed organs
Hemaphrodites
Ladder type nervous system
Protonephrida

Question 9

What are the classes of platyhelminthes?

Answer 9

Turberllaria
Trematoda and monogea
Cestoda

Question 10

What are the subgroups of the lophotrochosozoa?

Answer 10

Platyhelminthes
Nemertaens
Mollusks
Annelids
Lophophorate phyla
Rotifers

Question 11

How do the platyhelminthes move?

Answer 11

Their ventral surface is covered in cilia and they have a gridlike arrangement of centre circular muscles and inner longitudinal muscles