Module #11: The Invertebrates of Kingdom Animalia

Question 1

Vertebrates

Answer 1

Animals that possess a backbone

Question 2

Spherical Symmetry

Answer 2

An organism possesses spherical symmetry if it can be cut into two identical halves by any cut that runs through the organism’s center

Question 3

Radial symmetry

Answer 3

An organism possesses radial symmetry if it can be cut into two identical halves by any longitudinal cut through it’s center

Question 4

Bilateral symmetry

Answer 4

An organism possesses bilateral symmetry if it can be cut into two identical halves by a single longitudinal cut along it’s center which divides it into right and left halves

Question 5

Epidermis

Answer 5

An outer layer of cells designed to provide protection

Question 6

Mesenchyme

Answer 6

The jelly like substance that separates the epidermis from the inner cells in a sponge

Question 7

Collar cells

Answer 7

Flagellated cells that push water through a sponge

Question 8

Amoebocytes

Answer 8

Cells that move using pseudopods and preform different functions in different animals

Question 9

Invertebrates

Answer 9

Animals that lack a backbone

Question 10

Gemmule

Answer 10

A cluster of cells encased in a hard, spicule-reinforced shell

Question 11

Polyp

Answer 11

The sessile, tubular form of Cnidaria with a mouth and tentacles at one end and a basal disk at the other

Question 12

Medusa

Answer 12

A free swimming cnidarian with a bell-shaped body and tentacles

Question 13

Epithelium

Answer 13

Animal tissue consisting of one or more layers of cells that have only one free surface, because the other surface adheres to a membrane or other substance

Question 14

Mesoglea

Answer 14

The jellylike substance that separates the epithelial cells in a Cnidarian

Question 15

Nematocysts

Answer 15

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

Question 16

Testes

Answer 16

Organs that produce sperm

Question 17

Ovaries

Answer 17

Organs that produce eggs

Question 18

Anterior end

Answer 18

The end of an animal that contains it’s head

Question 19

Posterior end

Answer 19

The end of an animal that contains its tail

Question 20

Circulatory system

Answer 20

A system designed to transport food and other necessary substances throughout a creature’s body

Question 21

Nervous system

Answer 21

A system of sensitive cells that respond to stimuli such as sound, touch, and taste

Question 22

Ganglia (Singular: ganglion)

Answer 22

Masses of nerve cell bodies

Question 23

Hermaphrodidic

Answer 23

Possessing both male and female reproductive organs.

Question 24

Regeneration

Answer 24

The ability to regrow a missing part of the body

Question 25

Mantle

Answer 25

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

Question 26

Shell

Answer 26

A tough, multilayered structure secreted by the mantle, generally used for protection, but sometimes for upper body support.

Question 27

Visceral hump

Answer 27

A hump that contains a mollusk’s heart, digestive, and excretory organs

Question 28

Foot

Answer 28

A muscular organ that is used for locomotion and takes a variety of forms depending on the animal

Question 29

Radula

Answer 29

An organ covered with teeth that mollusk’s use to scrap food into their mouths

Question 30

Univalve

Answer 30

An organism with a single she’ll

Question 31

Bivalve

Answer 31

An organism with two shells

Question 32

List of organs in an earthworm

Answer 32

Ganglia pharynx aortic-arches esophagus ovaries oviduct crop gizzard dorsal-blood-vessel intestine clitellum
mouth ventral-nerve-cord seminal-recepticals seminal-vessels ventral-blood-vessels
Nephridia with nephridiopores opening through the epidermis