Quiz 9

Question 1

How do we classify animals

Answer 1

1. Type of body symmetry
2. Different tissue types
3. Body cavity (Coelom)
4. Patterns of embryonic development

Question 2

Types of Symmetry

Answer 2

Asymmetrical - without symmetry
Radial- Parts radiate from center
Bilateral- mirror image

Question 3

Tissues

Answer 3

Parazoa

-Porifera (pore bearer sponges) Eumetazoa

Question 4

Parazoa tissue

Answer 4

no specialized tissues or organs

Question 5

Eutmetazoa

Answer 5

more than one type of tissue and organs

Question 6

Germ Tissue Layers developed in Embryos

Answer 6

Endoderm
Mesoderm
Ectoderm

Question 7

Endoderm

Answer 7

(yellow) layer of germ tissue that develops in embryo
innermost layers
becomes gut, liver, lungs

Question 8

Mesoderm

Answer 8

(blue) layer of germ tissue that develops in embryos
middle layer
becomes skeleton, heart, kidney, muscle, blood

Question 9

Ectoderm

Answer 9

(red) layer of germ tissue that develops in embryos
outermost layer
becomes skin nervous system

Question 10

Classification based on Germ layers

Answer 10

Diploblastic

Triploblastic

Question 11

Diploblastic

Answer 11

two layers

endoderm and ectoderm ONLY

Question 12

Triploblastic

Answer 12

three layers, endoderm, mesoderm and ectoderm

Question 13

Three types of Body Cavity (Coeloms)

Answer 13

Acoelomate
Pseudocoelomate
Coelomate

Question 14

Acoelomate

Answer 14

-no true body cavity

Question 15

Pseudocoelomate

Answer 15

False body cavity not completely lined with mesoderm

Question 16

Coelomate

Answer 16

body cavity completely lined with mesodermal tissue

Question 17

Embryonic Development

Answer 17

Protostome

Deuterostome

Question 18

Protosome

Answer 18

Embryonic development

blastopore becomes the first mouth

Question 19

Deuterostome

Answer 19

Embryonic development

blastopore becomes the anus “second mouth”

Question 20

Porifera

Answer 20

Sponges
Asymmetrical 
No tissues, only cells 
Adults are sessile 
Hermaphroditic 
skeleton may be spongin or spicules

Question 21

Sponge body types

Answer 21

Asconoid: large spongecoel is dead space and limits their size
Synoconoid: choanocutes line canals extending
Leunocoid: distributed along chambers that branch off from canals (most common)

Question 22

Cnidaria

Answer 22

Jellyfish, Hydrozoa, sea anenome

Question 23

Phylum Cnidaria

Answer 23

Radial symmetry 
Diploblastic 
Tissues
specialized cells that sting prey for food or defense
hydrostatic skeleton 
Primitive Nervous system

Question 24

Cnidaria body types

Answer 24

Polyp (anamone)
Meducsa (jellyfish)
Two germ layers

Question 25

Platyhelminthes

Answer 25

``` Flatworms, planaria, Flukes, tapeworms Flat bodies -bilateral symmetry Triploblastic Simple nervous system First example of cephalization (development of head) ```

Question 26

Nematoda

Answer 26

``` Round worms, Vinegar eel Pseudocoelomates from eating infected pork cysts in muscle tissue Trichinosis ```

Question 27

Annelida

Answer 27

Truly segmented body cavity (septa) Closed circulatory system trochophore larval stage sandworms, earthworms, and parasitic and predatory, leaches

Question 28

Mollusca

Answer 28

Chiton, snails and slugs, clams and scallops, squid, octopuses, chambered nautilus

Question 29

Arthropoda

Answer 29

Spiders, Milipedes and centipedes, insects, crabs, ticks 2 body regions -Cephalothorax and abdomen

Question 30

Protostomes

Answer 30

mollusks annelids arthropods Spiral and determinate

Question 31

Deuterostomes

Answer 31

echinoderms chordates Radial and indeterminate

Question 32

Echinodermata

Answer 32

Sea stars and relatives

Question 33

Sea Stars

Answer 33

``` Class Asteroidea Spiny protective skins pental radial symmetry water vascular system tube feet skeleton of calcite plates ```

Question 34

SeaLily Fossil in the Lab counter

Answer 34

in lab

Question 35

Notochord

Answer 35

flexible longitude rod of cartilage | Located between the gut and the dorsal nerve cord

Question 36

Determinate

Answer 36

Protosome embryological cell division | daughter cells are fated to produce specific body parts

Question 37

Indeterminate

Answer 37

Deuterostome | stem cells are produced whose fates are not fixed at the time of division

Question 38

blastopore

Answer 38

opening to the developing gut cavity

Question 39

Deuterostome blastopore

Answer 39

helps form the anus | the protostome blastopore becomes the mouth

Question 40

mammals

Answer 40

mammary glands hair muscle diaphragm

Question 41

Amphibia

Answer 41

``` Frogs, toads, and salamanders incompletely terrestrial gas exhange through their moist skin born alive vertebrate red blood cells ```