Lesson 19 Terms

Question 1

Annelida

Answer 1

segmented worms

Question 2

Amebocytes

Answer 2

cells in a sponge that perform digestion and transport functions

Question 3

Phylum Arthropoda

Answer 3

insects, lobsters, spiders

Question 4

Asymmetrical

Answer 4

animals with no symmetry- phylum porifera

Question 5

Bilateral symmetry

Answer 5

organisms can be divided through the center to create mirror images

Question 6

Blastula

Answer 6

a hollow ball of cells

Question 7

Chordata

Answer 7

fish, birds, animals, reptiles

Question 8

Cleavage

Answer 8

when a single cell is converted to a multicellular zygote

Question 9

Cnidaira

Answer 9

jellyfish and sea anemones

Question 10

Collar cells

Answer 10

line the inside of the sponge’s hollow sac-like body; appear to have a collar, with flagella that extend from the collar

Question 11

Echinodermata

Answer 11

sea stars and sea urchins

Question 12

Ectoderm

Answer 12

outside layer

Question 13

Ectothermic

Answer 13

body temperature rises and falls with the temperature of the surrounding environment

Question 14

Endoderm

Answer 14

inside layer

Question 15

Endoskeleton

Answer 15

an internal skeleton made up of plates called ossicles

Question 16

Endothermic

Answer 16

use energy from cellular respiration to keep warm

Question 17

Exoskeleton

Answer 17

plated outer covering

Question 18

Gastrulation

Answer 18

occurs when cells move inside the blastula and form multiple layers of cells called germ layers

Question 19

Germ layers

Answer 19

multiple layers of cells: ectoderm, mesoderm, endoderm

Question 20

Hermaphroditic

Answer 20

having both male and female reproductive organs that produce both sperm and eggs

Question 21

Hydroskeleton

Answer 21

fluid-filled compartment in the body

Question 22

Invertebrates

Answer 22

animals that don’t have backbones

Question 23

Invertebrates

Answer 23

animals that don’t have backbones

Question 24

Mesenchyme

Answer 24

the jellylike substance that separates the epidermis from the inner cells in a sponge

Question 25

Mesoderm

Answer 25

the middle germ layer which will form the circulatory system, muscle, and bones

Question 26

Mollusca

Answer 26

clams, snails, and squids

Question 27

Motile

Answer 27

capable of movement

Question 28

Nematoda

Answer 28

roundworms

Question 29

Platyhelminthes

Answer 29

flatworms

Question 29

Platyhelminthes

Answer 29

flatworms

Question 30

Porifera

Answer 30

sponges

Question 31

Radial symmetry

Answer 31

organism can be divided in many different ways to form mirror images

Question 32

Sessile

Answer 32

an organism that does not move

Question 33

Spicules

Answer 33

a network support system made of lime or silica with a hard spiny feel

Question 34

Spongin

Answer 34

a web of protein with a soft feel

Question 35

Vertebrates

Answer 35

animals that have backbones