Diversity of Animals (ch. 24)

Question 1

peritoneum

Answer 1

The modified mesoderm layer of the coelom that is formed in vertebrates

Question 2

mesenteries

Answer 2

folding of the peritoneum that holds organs in place

Question 3

archeterion

Answer 3

Inner section of endoderm, where the mesoderm formed in deuterostomes

Question 4

lophotrochozoa

Answer 4

group of protostomes. lophophores: have a ciliated tenticle structure used for feeding. trochophores: exist for a bit as free-swimming larvae

Question 5

ecdysozoa

Answer 5

group of protostomes. they undergo ecdysis (shedding outer layers)

Question 6

choanocytes

Answer 6

inner layer of cell wall in sponges. made up of flagellum and microvilli

Question 7

archaeocytes

Answer 7

cells that make up the mesophyll portion of sponge cell walls. They assist in transportation of waste and nutrients.

Question 8

spicles

Answer 8

made in the mesophyll of sponges, responsible for their rigid shape.

Question 9

nematocysts

Answer 9

stinging organelles used by phlum cnidria to capture prey

Question 10

class scyphozoa and cubozoa

Answer 10

part of phylum cnidria, jellyfish and cube jellies

Question 11

class anthozoa

Answer 11

part of phylum cnidria, coral and stuff

Question 12

class hydrozoa

Answer 12

part of phylum cnidria, have both medusae and polyps stage.

Question 13

ganglon

Answer 13

primitive brain in phylum acoela (flatworms)

Question 14

hermatophites

Answer 14

produce male and female gametes

Question 15

flame cell system

Answer 15

used by flatworms to control their inner body fluids

Question 16

class turbellaria

Answer 16

part of phylum acoela, free-living, hermatophites

Question 17

class mnogenea and trematoda

Answer 17

part of phylum acoela, parasites (ecto+endo) with suckers and hooks

Question 18

class cestoda

Answer 18

part of phylum acoela, tapeworms, have a sclorex and proglottids

Question 19

sclorex

Answer 19

hooks for tapeworms to latch onto prey

Question 20

proglottids

Answer 20

repeating units in tapeworms that are each capable of reproduction