BIOL112 Si- Session 26- Ch. 28 (0art 2)- (4_17)

Which clade contains only vertebrates?

• Lophotrochozoa

• Ecdysozoa

• Chordata

• Cnidaria

The ____ of cnidarians is asexual, while the ____ is sexual.

• haploid polyp, diploid medusa

• sessile polyp, medusa

• diploid polyp, haploid medusa

• medusa, motile polyp

The ciliated mouth of lophotrochozoans that is used for feeding.

• acoelomatee

• trochophore

• larval stage

• lophophore

Lophotrochozoa are all ____.

• bilaterally symmetrical

• acoelomates

• parasites

• parasites

Free-living means that an organism can freely move from one host to another.

• True

• False

Platyhelminthes do not have ____.

• cephalization

• two openings in their gastrovascular cavity

• flame cells

• ganglia

Tapeworms are composed of scolex and protonephridia.

• True

• False

All molluscs have a(n) ____.

• open circulatory system

• mantle

• acoelom

• lophophore

Which is not a main body part of molluscs?

• muscular foot

• visceral mass

• radula

• mantle

Which is not a major clade of mollusc?

• polyplacophora

• nematoda

• bivalvia

• cephalopoda