Ch. 27-29 Animals

Question 1

animals

Answer 1

develop through embryonic stages most are motile during at least part of their life cycle

Question 2

radial symmetry

Answer 2

no front/ back or left/right

Question 3

bilateral symmetry

Answer 3

2 sided symmetry

Question 4

ectoderm

Answer 4

germ layer covering the embryos surface

Question 5

endoderm

Answer 5

innermost germ layer and lines the developing digestive tube called the archenteron

Question 6

mesoderm

Answer 6

third germ layer that fills the space between the ectoderm and the endoderm in bilaterally symmetric animals

Question 7

sponges

Answer 7

porifera
lack true tissues
choanocytes

Question 8

cnidarians

Answer 8

cnidarian

jellies, sea anemones

Question 9

flatworms

Answer 9

platyhelminthes

Question 10

protostone

Answer 10

organism where first opening to digestive system that develops is the mouth

Question 11

annelids

Answer 11

annelida

earthworms

Question 12

mollusks

Answer 12

mollusca

bivalves, gastropods

Question 13

mantle

Answer 13

an extension of the body mass that drapes back on itself like a skirt and covers the mantle cavity, secretes the shell in species with a shell

Question 14

gastropod

Answer 14

mollusk that moves about on its enlarged foot

Question 15

bivalve

Answer 15

filter feeders, oysters, mussels

Question 16

cephalopod

Answer 16

predatory, jet propulsion

squids, octopus, cuttlefish

Question 17

deuterostome

Answer 17

organism whose first opening to digestive system that develops is the anus

Question 18

roundworms

Answer 18

nematoda

free living or parasytes

Question 19

arthropod

Answer 19

arthropoda

arachnids, exoskeletons

Question 20

cuagulogen

Answer 20

forms goey substance to prevent spread of bacteria

Question 21

echinoderms

Answer 21

echinodermata
sea stars
water vascular system

Question 22

chordates

Answer 22

chordata
notochord extends length of body
dorsal hollow nerve cord paralleles notocord

Question 23

invertebrate chordates

Answer 23

lancelots

tunicates

Question 24

amniote

Answer 24

eggs in land tetrapods

reptiles, mammals, birds

Question 25

for amphibians fertilization is

Answer 25

external, eggs and sperm released in water

Question 26

amniotes

Answer 26

first vertebrates that had internal reproduction

didnt need water

Question 27

ectotherm

Answer 27

cold blooded

heat from environment

Question 28

endotherm

Answer 28

warm

produce own heat

Question 29

birds have a

Answer 29

4 chambered heart

Question 30

monotremes

Answer 30

egg laying mammals

Question 31

marsupials

Answer 31

pouched mammals

Question 32

placental mammals

Answer 32

placenta

Question 33

anthropoids

Answer 33

include monkeys, people, apes

Question 34

hominins

Answer 34

humans and closest extinct relatives