Simple Invertebrates

Question 1

Porifera

Answer 1

An aquatic invertebrate. Like a sponge.

Question 2

Cnidaria

Answer 2

An aquatic invertebrate. Like a jellyfish.

Question 3

Annelid

Answer 3

A segmented worm. Like an earthworm or leech.

Question 4

Hydroid

Answer 4

a minute freshwater coelenterate with a stalklike tubular body and a ring of tentacles around the mouth

Question 5

Jellyfish

Answer 5

A free swimming marine creature. Has radial symmetry, and catches prey with stinging tentacles.

Question 6

Platyhelminthes

Answer 6

Soft bodied invertebrates, flatworms

Question 7

Nematoda

Answer 7

Round worms.

Question 8

Pinworms

Answer 8

A small nematode worm which is a parasite.

Question 9

Tapeworms

Answer 9

A parasitic flatworm that lives in the stomachs of humans and other vertebrates.

Question 10

Bivalves

Answer 10

An aquatic mollusk that has a compressed body enclosed within a hinged shell. Oysters, clams.

Question 11

Gastropods

Answer 11

A mollusk like a snail or slug.

Question 12

Coelomate

Answer 12

Have a body cavity.

Question 13

Acoelomate

Answer 13

An invertebrate lacking a coelom. ONLY has a digestive cavity.

Question 14

Radial Symmetry

Answer 14

Symmetry around a central axis.

Question 15

Asymmetry

Answer 15

No Symmetry

Question 16

Bilateral Symmetry

Answer 16

Symmetry split along two halves. In complex organisms.

Question 17

Tentacle

Answer 17

A soft flexible limb, usually with suction cups.

Question 18

Cnidocyte

Answer 18

An explosive cell containing one giant secretory organelle.

Question 19

Ectoderm

Answer 19

The outermost layer of cells or tissue of an embryo in early development

Question 20

Endoderm

Answer 20

The innermost layer of cells or tissue of an embryo in early development

Question 21

Ovary

Answer 21

A female sex organ. Contains all the ovums, or eggs.

Question 22

Teste

Answer 22

A male sex organ. Contains sperm.