Chapter 32

Question 1

Tissues

Answer 1

Groups of similar cells that act as a functional unit

Question 2

Cleavage

Answer 2

A succession of mitotic cell divisions without cell growth between the divisions

Question 3

Blastula

Answer 3

A multicellular stage which in many animals takes the form of a hollow ball

Question 4

Gastrulation

Answer 4

The layers of embryonic tissues that will develop into adult body parts are produced

Question 5

Gastrula

Answer 5

The resulting developmental stage

Question 6

Larva

Answer 6

Sexually immature form of an animal that is morphologically distinct from the adult usually eat different food and may even have a different habitat then the adult

Question 7

Ediacaran biota

Answer 7

Members of an early group of soft bodied multicellular eukaryotes

Question 8

Bilaterians

Answer 8

clade whose members hav a two-sided or bilaterally symmetric form and a complete digestive tract

Question 9

Amphibians

Answer 9

Frogs and salamanders

Question 10

Amniotes

Answer 10

Reptiles birds and mammals

Question 11

Mesozoic era

Answer 11

251-65.6 mya

Question 12

Paleozoic era

Answer 12

542-251 mya

Question 13

Cenozoic era

Answer 13

65.5 mya -present

Question 14

Body plan

Answer 14

A particular set of morphological and developmental traits integrated into a functional whole, The living animal

Question 15

Evo devo

Answer 15

The interface between evolution and development

Question 16

Radial symmetry

Answer 16

Does not have a left side and the right side it is equal all around

Question 17

Bilateral symmetry

Answer 17

Such as a lobster has a left side and the right side

Question 18

Ectoderm

Answer 18

The germ layer covering the surface of the embryo gives rise to the outer covering of the animal

Question 19

Endoderm

Answer 19

The innermost germ later Lines the pouch that forms during gastrulation

Question 20

Diploblastic

Answer 20

Only have ectoderm and endoderm germ layers

Question 21

Mesoderm

Answer 21

Fills much of the space between the ectoderm in the endoderm. All bilaterally symmetrical animals have a third germ layer

Question 22

Triploblastic

Answer 22

Having three germ layers. Animals with bilateral symmetry have this.

Question 23

Body cavity or coelom

Answer 23

A fluid or air filled space located between the digestive tract and the outer body will all

Question 24

Coelomates

Answer 24

Animals with a true coelom

Question 25

Pseudocoelom

Answer 25

A body cavity that is formed from mesoderm and endoderm. " false" body cavity.

Question 26

Pseudocoelomates

Answer 26

Animals that have a coelomate. Also known as tissue derived from mesoderm.

Question 27

Acelomates

Answer 27

Animals that like a body cavity all together

Question 28

Ecdysis

Answer 28

The process of shedding old exoskeleton

Question 29

Eumetazoa

Answer 29

A class of animals with true tissues

Question 30

Archenteron

Answer 30

Embryos developing digestive tube initially forms as a blind pouch. Which becomes the gut.

Question 31

Blastopore

Answer 31

The indentation that during gastrulation leads to the formation of the archenteron

Question 32

Metazoa

Answer 32

Clare that all animals evolved from

Question 33

Bilateria

Answer 33

Clade that majority of animals are in. Have bilateral symmetry and the presence of threee germ layers.

Question 34

Threee major clades of bilaterial animals?

Answer 34

Dueterostomia, lophotrophozoans, and ecdysozoa

Question 35

Chordata

Answer 35

The only clade with vertebrates

Question 36

Two major clades that are entirely composed of inverts

Answer 36

Ecdysozoa and lophotrophozoans

Question 37

Ecdysozoa

Answer 37

Characteristic shared by nematoads, anthropoids , and some of the other ecdysozoan phyla. Secreted external exoskeleton, molts, squirms out of the exoskeleton, and secretes a larger one

Question 38

Lophotrophozoans

Answer 38

Two different features. Develop a structure called lophophore, a crown of ciliated tentacles that function in feeding. Distinctive development stage called loohotrophore larva.

Question 39

Porifera

Answer 39

Sponges phylum

Question 40

Monophyletic

Answer 40

A group of rasa that consists of of a common ancestor and all of its descendants

Question 41

Diploblastic

Answer 41

Two germ layers

Question 42

Triploblastic

Answer 42

Three germ layers. May have pdeudocoleom or a true coelom

Question 43

What is a characteristic unique to animals

Answer 43

Gastrulation

Question 44

The distinction between sponges and other animal phyla is based mainly on the absence versus the presence of?

Answer 44

True tissues

Question 45

Which of the following was probably the least important factor in bringing about the Cambrian explosion?

Answer 45

The movement of animals onto land