Exam 3

Question 1

parazoa

Answer 1

lack true tissue

Question 2

eumetazoan

Answer 2

have true tissue

Question 3

first bifurcation in the animal phylogeny

Answer 3

tissue

Question 4

second bifurcation in the animal phylogeny

Answer 4

symmetry

Question 5

eumetazoan symmetry

Answer 5

radial or bilateral

Question 6

radial symmetry, radiata

Answer 6

multiple mirror images can be drawn across center, diploblastic

Question 7

bilateral symmetry, bilateria

Answer 7

1 mirror plan can be drawn, triploblastic

Question 8

third bifurcate in the animal phylogeny

Answer 8

body cavity (true coelom)

Question 9

protosomes

Answer 9

mouth develops 1st & determined development

Question 10

deuterostomes

Answer 10

anus develops 1st & undetermined development

Question 11

morphogensis

Answer 11

how organisms shaper is aquired

Question 12

phylum porifera

Answer 12

parazoa, sponges, spongocoel lined with choanocytes, have amoebocytes

Question 13

amoebocytes

Answer 13

mobil, pick up and transport nutrients throughout the body

Question 14

phylum cnidaria

Answer 14

eumetazoan (true tissue), radiata, jelly fish & corals, 2 body parts: polyp & medusa, gastrovascular cavity, mesoglea, nerve net and cnidocytes

Question 15

polyp

Answer 15

sessile part of the body, anchored to a substrate

Question 16

medusa

Answer 16

mobile part of the body

Question 17

gastrovascular cavity

Answer 17

for digestion and excretion (mouth=anus)

Question 18

mesolgea

Answer 18

jelly like substance between the 2 layers that provides support

Question 19

cnidocytes

Answer 19

for defense and capture prey have cnidae AND IF they stink = nematocytes

Question 20

coelomates

Answer 20

have a body cavity

Question 21

acoelomates

Answer 21

lack body cavity, muscle contractions effect all organs (no buffer)

Question 22

2 types of coelomates

Answer 22

pseudocoelomates & true coelomates

Question 23

pseudocoelomates

Answer 23

have a body cavity partially lined with tissue

Question 24

coelomates

Answer 24

have a body cavity completely lined

Question 25

coelom

Answer 25

flue later that separates the gut from the outer layer wall

Question 26

phylum platyheliminthes

Answer 26

a coelomates (no body cavity), flatworms, no fluid-layer, eyespots & paired ganglia can regenerate body fragments. parasites: tapeworms and flukes

Question 27

schistosoma mansoni

Answer 27

fluke, fertilized eggs eliminate from host’s feces & 1st larvae –> 2nd host = snail –> asexual reproduction & 2nd larvae–> humans –> lungs and liver