Marine Invertebrates 2.3

Question 1

Soft-bodied stinging animals such as corals, sea anemones, and jellyfish. All radially symmetrical.

Answer 1

Cnidarians.

Question 2

A phylum of marine animals that are gelatinous, zooplanktonic, and have a unique body plan.

Answer 2

Ctenophora.

Question 3

A phylum of marine animals that includes sea stars, sea cucumbers, sea urchins, sand dollars, and brittle stars.

Answer 3

Echinodermata. Radially symmetric. Reproduce sexually.

Question 4

A phylum of marine invertebrates that are wormlike in shape and are closely related to echinoderms and chordates. Looks like a dick.

Answer 4

Hemichordata

Question 5

Nearly all genera of bryozoa live in colonies. Scientists refer to individuals within a colony as _______.

Answer 5

Zooids.

Question 6

A phylum of tiny aquatic invertebrates that live in colonies; also known as moss animals.

Answer 6

Bryozoa.

Question 7

A phylum of predatory marine worms that are a significant part of plankton worldwide. Sexually.

Answer 7

Chaetognatha.

Kee–tahg–nah—tha

Question 8

Invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin.

Answer 8

Arthropoda

Question 9

Most mollusks possess a tongue-like structure called the ______, which helps in feeding.

Answer 9

Radula.

Question 10

A large phylum of invertebrate animals that have soft bodies and are often protected by a shell (such as snails, clams, octopuses or squids).

Answer 10

Mollusca.

Question 11

A phylum of segmented invertebrates, also known as segmented worms, that includes earthworms, leeches, and marine worms.

Answer 11

Annelida

Question 12

Invertebrate organisms with a flat, soft body.

Answer 12

Platyhelminthes.

Question 13

A phylum of microscopic, unsegmented, bilaterally symmetrical invertebrates that are mainly found in freshwater

Answer 13

Rotifera.

Question 14

________ refers to the evolutionary history of a group of organisms, such as a tribe or a racial group.

Answer 14

Phylo.

Question 15

A taxonomic rank that classifies organisms into groups based on shared characteristics, evolutionary relationships, or both

Answer 15

Phylum (singlar)
Phyla (plural)

Question 16

____________is the scientific term for the phylum of animals that includes sponges, essentially meaning “pore-bearing” organisms.

Answer 16

Porifera. Radial symmetrical; asymmetrical.

Question 17

Sponges contain specialized cells called choanocytes that possess __________.

Answer 17

Flagella.

Question 18

Porifera: The beating of the flagella draws a current of water through the numerous pores called ______ present all over the body.

Answer 18

Ostia.

Minuscule pores present on the body walls of sponges.

Question 19

Porifera: The water flows out through a large, single opening called the __________.

Answer 19

Osculum.

Question 20

They filter organic matter through the current of water that passes water through their body. Therefore they are called ________.

Answer 20

Filter feeders.

Question 21

Cnidarians have tenctacles that have stinging cells called ________.

Answer 21

Cnidocytes.

(Nie–doe–sights)

Question 22

Cnidarians exhibit two forms of structures: the ______ and ______.

Answer 22

Polyp & medusa.

Polyps are stationary and cylindrical in shape with opening toward the top. The medusa are mobile and bell shaped with the opening toward the bottom.

Question 23

Ctenorphora capture their prey by using sticky cells called _________ on their tentacles.

Answer 23

Colloblasts.

Question 24

Echinoderms possess a unique system called the _________. They have rows of hollow tube feet, which draw water. These filled tube feet help the animals to move and grab prey.

Answer 24

Water vascular system.