Other

Question 1

Cephilization

Answer 1

nerve tissue is concentrated in head region
advantages - sense organs all together

Question 2

Triploblastic

Answer 2

protostomes and deuterostomes

Question 3

Protostomes

Answer 3

mouth forms first, then anus

Question 4

Deuterostomes

Answer 4

anus forms first, mouth forms second

Question 5

triploblastic

Answer 5

3 germ layers - develop into different structures of animal
- ectoderm, mesoderm, endoderm

Question 6

coelom

Answer 6

body cavity derived from mesoderm (middle layer) filled with fluid to help provide space and protect organs

Question 7

Porifera

Answer 7

sponges!
- aquatic
- sessile (don’t move)
- pores body (oxygen and food pass through these)
- no organs or true tissue
- no cephilazation
- no ceolem

Question 8

Cnidaria

Answer 8

ex. jellyfish, sea enemies, hydras
- one gut opening gut and anus
- fresh and salt water
- polyp and medusa form
- specialized cells
- radial symmetry
- no cephalization
- no ceolem

Question 9

Platyhelminthes

Answer 9

flat worms, planarian, tapeworms
- many aquatic
- few are parasitic
- one gut opening
- bilateral symmetry
- cephalization
- no coelom
Protostomes (mouth first, anus second)

Question 10

Nematoda

Answer 10

nematodes, hock worms, pin worms
- parasites, but not all
- aquatic and terrestrial
- bilateral cephalization
- no coelom
- they are protostomes (mouth first, anus second)

Question 11

Mollusca

Answer 11

squid, snails, clams, octupus
- aquatic, both water some terrestrial
- some have shell
- muscular foot fro morevment
- do have cephalization
- true coelom
- are protostomes

Question 12

Annelida

Answer 12

worms: earthworms, tubeworms, leeches
- aquatic and terrestrial
- segmented, repeated body parts
- bilateral symmetry
- cephi lzation
true coelom
- protostomes

Question 13

Arthropoda

Answer 13

insects, spiders, lobsters
- aquatic and terrestrial, many fly
- joited appendages
- segmented bodies
- tough exoskeleton
- bilaterla
- cephalization
- true coelom
- protostomes

Question 13

Echinodermata

Answer 13

sea stars, sea urchins, sea cucumbers
- aquatic salt water
- bilateral symmetry young, radial symmetry adult
- can regenerate portions of their structure
- no cephalization
- symmetry (both based on stage of life)
- true coelom (fluid cavity)
- deuterostomes (anus first, mouth second)

Question 14

Chordata

Answer 14

fish, amphibians, reptiles, humans
- notochord: flexible rod like structure
- dorsal nerve cord
- postnala tail
- slits or pouches
- aqauatic and terrestrial, some fly
- bilateral symmetry
- cephalization
- true coelom
- deuterostomes

Question 15

notechord

Answer 15

flexible rod like structure