Test for Module 13

Question 1

Answer 1

clitellum

Question 2

Which phylum of animals discussed in this module has nematocysts

Answer 2

Cnidaria

Question 3

mantle

Answer 3

a sheath of tissue that encloses the vital organs of a mollusk, makes the mollusk’s shell, and performs respiration

Question 4

What is the difference between an open circulatory system and a closed circulatory system?

Answer 4

In an open circulatory system the blood is pumped into chambers where it comes in direct contact with tissues and organs. In a closed circulatory system, the blood stays in vessels.

Question 5

What phylum does a flatworm belong to?

Answer 5

platyhelminthes

Question 6

hermaphroditic

Answer 6

possessing both the male and the female reproductive organs

Question 7

What phylum does a jellyfish belong to?

Answer 7

cnidaria

Question 8

What phylum does a snail belong to?

Answer 8

mollusca

Question 9

Answer 9

oviduct

Question 10

nematocysts

Answer 10

small capsules that contain a toxin which is injected into prey or predators

Question 11

What phylum does a segmented sea worm belong to?

Answer 11

annelida

Question 12

vertebrates

Answer 12

animals that possess a backbone

Question 13

What does the term cephalization mean?

Answer 13

the concentration of nerves and sensory organs in the anterior or “head” end of an organism

Question 14

posterior end

Answer 14

the end of an animal that contain its tail

Question 15

When an earthworm mates, its seminal vesicles are ___ and its seminal receptacles get ___.

Answer 15

emptied; filled

Question 16

invertebrates

Answer 16

animals that have a backbone

Question 17

What is the common mode of asexual reproduction among the organisms of phylum cnidaria?

Answer 17

budding

Question 18

Answer 18

ganglia

Question 19

Answer 19

dorsal blood vessel

Question 20

What function does the cuticle perform in an earth worm?

Answer 20

it allows the earthworm to get oxygen and release carbon dioxide

Question 21

an organism with two shells

Answer 21

bivalve

Question 22

What is the difference between a gastrovascular cavity and a complete digestive tract?

Answer 22

A gastrovascular cavity or digestive sac has only one opening for food to enter and wastes to exit. A complete digestive tract is a one-way tube with two openings - a mouth at one end where food enters, and anus at the other end where wastes exit.

Question 23

What phylum does sponge belong to?

Answer 23

porifera

Question 24

What do sponges eat and how do they get their food?

Answer 24

the algae, bacteria, and organic matter that is in the water

Question 25

What is the common mode of asexual reproduction among the organisms of phylum platyhelminthes?

Answer 25

regeneration

Question 26

What is the difference between a hard, prickly sponge, and a soft sponge?

Answer 26

hard, prickly sponges contain spicules while soft sponges contain spongin

Question 27

Parasites can have ___ because they need not search for food.

Answer 27

simple nervous system

Question 28

Answer 28

esophagus

Question 29

Answer 29

ventral nerve cord

Question 30

Answer 30

seminal vesicle

Question 31

an organism with a single shell

Answer 31

univalve