Ch. 33

Question 1

What are multicellular heterotrophs with mobility and sexual reproduction?

Answer 1

Animals

Question 2

What is unique about animal chracteristics?

Answer 2

-No cell walls
-Extracellullar matrix
-Cell junctions for communication

Question 3

What type of feeding involves the filtering of particles from surrounding water?

Answer 3

Suspension feeding

Question 4

What type of feeding involves eating large food pieces?

Answer 4

Bulk feeding

Question 5

What type of feeding involves sucking sap or animal body fluids?

Answer 5

Fluid feeding

Question 6

What tissues are unique to animals?

Answer 6

Muscle and nervous

Question 7

Most animals are capable of some kind of ______

Answer 7

Locomotion

Question 8

What coordinates animal movement?

Answer 8

Nervous system

Question 9

Nearly all animals reproduce ______

Answer 9

Sexually

Question 10

What type of fertilization is common in terrestrial species?

Answer 10

Internal fertilization

Question 11

What type of fertilization is common in aquatic species?

Answer 11

External fertilization

Question 12

What is the developmental phenomenon in which animal changes from a juvenile to an adult form?

Answer 12

Metamorphosis

Question 13

Most biologists classify the animal kingdom as a _______ group

Answer 13

Monophyletic

Question 14

How many animal phyla are there?

Answer 14

35

Question 15

What are different types of tissue between external and internal layers called?

Answer 15

Germ layers

Question 16

What is the closest living relative of all animals?

Answer 16

Choanoflagellates

Question 17

Choanoflagellates are similar to

Answer 17

Choanocytes on sponges

Question 18

Choanoflagellates have a _______ flagellum surrounded by a collar of cytoplasmic tentacles

Answer 18

Single

Question 19

The traditional classifications based on body plans are?

Answer 19

-Body symmetry
-Number of germ layers
-specific features of embryonic development
*molecular data

Question 20

Eumetazoa is divided by

Answer 20

Symmetry

Question 21

Radiata has what kind of symmetry?

Answer 21

Radial

Question 22

Which symmetry often displays a circular or tubular shape with a mouth at one end?

Answer 22

Radial

Question 23

Bilateria has what kind of symmetry?

Answer 23

Bilateral

Question 24

What symmetry has chephalization (dorsal and ventral sides) and anterior and posterior ends?

Answer 24

Bilateria

Question 25

Radiata have how many germ layers?

Answer 25

Diploblastic (2)

Question 26

Bilateria have how many germ layers?

Answer 26

Triploblastic (3)

Question 27

When do cellular layers develop?

Answer 27

Gastrulation

Question 28

What is the 3rd germ layer in bilateral animals?

Answer 28

Mesoderm

Question 29

The mesoderm forms what in bilateral animals?

Answer 29

Muscles and most organs

Question 30

What is has a blastopore becomes a mouth, cleavage is determinant, and has spiral cleavage?

Answer 30

Protostome

Question 31

What has a blastopore that becomes an anus, cleavage is indeterminate, and radial cleavage?

Answer 31

Deuterostome

Question 32

What is body segmentation called?

Answer 32

Coelom

Question 33

What is a coelom?

Answer 33

Fluid filled cavity

Question 34

What body cavity is completely lined with mesoderm?

Answer 34

Coelmate

Question 35

What body cavity is partially lined with mesoderm?

Answer 35

Pseudocoelomate

Question 36

What organisms lack a body cavity and have a mesenchyme?

Answer 36

Acoelomate

Question 37

What are the functions of a coelom?

Answer 37

-cushions internal organs -hydrostatic skeleton: fluid pushes from one part of the body to the other acting as contractions -fluid acts as a simple circulatory system

Question 38

What organisms molt and shed an exoskeleton that must be regrown?

Answer 38

Ecydszoa

Question 39

What organisms having feeding tentacles (lophophores) and a band of cilia for swimming (trochophore larva)

Answer 39

Lophotrochozoa

Question 40

Who is included in ecydysozoa?

Answer 40

Nematodes and arthropods

Question 41

Who is included in lophotrochozoa?

Answer 41

Mollusks and annelids