Chapter 32: Animal Diversity Pt. 2

Question 1

Five important points about the relationships among living animals are reflected in their phylogeny (1)

Answer 1

All animals share a common ancestor

Question 2

Five important points about the relationships among living animals are reflected in their phylogeny (2)

Answer 2

Sponges are the sister group to all other animals

Question 3

Five important points about the relationships among living animals are reflected in their phylogeny (3)

Answer 3

Eumetazoa is a clade of animals with tissues

Question 4

All animals except for sponges and few others belong to the _____________ (“true animals”)

Answer 4

Eumetazoans

Question 5

Five important points about the relationships among living animals are reflected in their phylogeny (4)

Answer 5

Most animal phyla belong to the clade Bilateria

Question 6

Five important points about the relationships among living animals are reflected in their phylogeny (5)

Answer 6

There are three major clades of bilaterian animals

Question 7

Most bilaterians are ___________, animals that lack a backbone

Answer 7

Invertebrates

Question 8

_____________ is the only phylum that also includes vertebrates, animals with a backbone

Answer 8

Chordata

Question 9

What are the 3 clades of Bilaterians

Answer 9

Deuterostomia, Ecdysozoa, and Lophotrochozoa

Question 10

Members of ___________ may be invertebrates or vertebrates

Answer 10

Deuterostomia

Question 11

What 3 are included in the Dueterostomia clade?

Answer 11

HEC: Hemichordates (acorn worms), echnioderms (sea stars and relatives), and chordates (including vertebrates)

Question 12

Which 2 clades of Bilaterians are invertebrates

Answer 12

Ecdyosozoans and Lophotrochozoans

Question 13

All members of __________ secrete an external skeleton (exoskeleton)

Answer 13

Ecdysozoa

Question 14

The exoskeleton is shed to allow for growth, a process called

Answer 14

Ecdysis

Question 15

Nematodes and anthropods are

Answer 15

Ecdysozoans

Question 16

The clade __________ is named for 2 different features observed in its members

Answer 16

Lophotrochozoa

Question 17

In Lophotrochozoa, ectoprocts, develop a ____________, a crown of Ciliates tentacles used for feeding

Answer 17

Lophophore

Question 18

In Lophotrochozoa, molluscs and annelids, have a developmental stage called the

Answer 18

Trochophore larva