Vocabulary Chapter 18

Question 0

A segmented worm

Answer 0

Annelid

Question 1

An amoeba like cell that moves through pseudopodia

Answer 1

Amoebocyte

Question 2

Head of a bilaterally symmetric animal

Answer 2

Anterior

Question 3

Spiders

Answer 3

Arachnid

Question 4

Most diverse phylum in the animal kingdom

Answer 4

Arthropod

Question 5

Arrangement of body parts

Answer 5

Bilateral system

Question 6

Member of the clade of animals bilateria exhibiting bilateral symmetry

Answer 6

Bilaterian

Question 7

Molluscs

Answer 7

Bivalve

Question 8

Embryonic stage that marks the end of cleavage during animal development

Answer 8

Blastula

Question 9

Fluid-containing space between the digestive track and the body wall

Answer 9

Body cavity

Question 10

A carnivorous terrestrial arthropod that has one pair of long legs for each one of its numerous body segments

Answer 10

Centipede

Question 11

A member of a group of molluscs that include squids and octopi

Answer 11

Cephalopod

Question 12

Transformation of a larva into an adult

Answer 12

Metamorphosis

Question 13

A terrestrial arthropod that has two pairs of short legs for each of its numerous body segments that eats decaying plant matter

Answer 13

Millipede

Question 14

Soft bodied animal characterized by a muscular foot

Answer 14

Molluscs

Question 15

Process of shedding an old exoskeleton

Answer 15

Molting

Question 16

A round worm

Answer 16

Nematode

Question 17

A flexible, cartilage-like, longitudinal rod located between the digestive tract and nerve cord in chordate animals

Answer 17

Notochord

Question 18

A circulatory system in which blood is pumped

Answer 18

Open circulatory system

Question 19

Structures found in the pharynx

Answer 19

Pharyngeal gill slits

Question 20

A member of the largest group of annelids

Answer 20

Polychaetes

Question 21

One of two types of cnidarian body forms

Answer 21

Polyp

Question 22

A tail posterior to the anus

Answer 22

Post-anal tail

Question 23

Pertaining to the rear

Answer 23

Posterior

Question 24

An animal with a coelom that develops from solid masses of cells that arise between the digestive tube and the body wall of the embryo

Answer 24

Protostome

Question 25

A body cavity that is in direct contact with the wall of the digestive tract

Answer 25

Pseudocoelom

Question 26

An arrangement of the body parts of an organism like pieces of a pie around an imaginary central axis

Answer 26

Radial symmetry

Question 27

A toothed rasping organ

Answer 27

Radula

Question 28

Subdivision along the length of an animal body into a series of repeated parts called segments

Answer 28

Segmentation

Question 29

An organism that is anchored to its substrate

Answer 29

Sessile

Question 30

An aquatic animal characterized by a highly porous body

Answer 30

Sponge

Question 31

Aquatic animal that sifts small food particles from the water

Answer 31

Suspension feeder

Question 32

A parasitic flatworm characterized by the absence of a digestive tract

Answer 32

Tapeworm

Question 33

One of a group of invertebrate chordates

Answer 33

Tunicate

Question 34

Pertaining to the underside, or bottom, of a bilaterally symmetric animal

Answer 34

Ventral

Question 35

One of three main parts of a mollusc, containing most of the internal organs

Answer 35

Visceral mass

Question 36

In echinoderms, a radially arranged system of water-filled canals that branch into extensions called tube feet.

Answer 36

Water vascular system