Unit 2 Test - Phylum Porifera and Phylum Cnidaria

C. complete digestive system

B. nerve cords

D. stinging cells

A. epidermis and gastrodermis

B. their mobility as adults

C. water flow through the sponge body

A. endosymbiosis

D. their dioecious reproductive structures

A. derived from gastrodermal tissue

D. Their sexual organs are derived from epidermal tissue.

C. they are hermaphroditic

B. housed in cnidocytes

B. multiple pores

C. spicules composed of silica

D. a polysaccharide gel and dead cells

A. a collagen-like gel and suspended cells

B. pinacocytes

C. amebocytes

A. choanoflagellocytes

D. lophocytes

D. They have no body symmetry.

C. They are multicellular.

A. They are exclusively marine animals.

B. They are sessile as adults.

B. the most varied of all invertebrates.

D. The simplest of all invertebrates.

A. the most habitat expansive of all invertebrates.

C. the largest of all invertebrates.

C. Asymmetry

A. Radial symmetry

B. Bilateral symmetry

D. None of the above

B. Bilateral symmetry

D. None of the above

C. Asymmetry

A. Radial symmetry

Phylum Porifera and Mollusca

Phylum Cnidaria and Platyhelminthes

Phylum Porifera and Phylum Cnidaria

Phylum Cnidaria and Arthropoda

Mollusks

Arthropods

Sponges

Cnidarians

4

5

2

3

Sea Anemone

Hydra

Jellyfish

Coral

They have a nerve net.

They have a complete digestive system.

They have a gastrovascular cavity.

They have stinging cells.

To filter water

To reproduce

To support the sponge's structure.

To capture prey

Having no layers

Having multiple layers

Having two embryonic germ layers.

Having three layers

A cell that delivers a paralyzing sting.

A sharp, needle-like piece

A sulfur-containing protein

A root-like structure

Lives within the cells of another organism.

Provides structural support

Captures prey

Filters water

Forms the skeletal structure of sponges.

A barbed, threadlike tube

A sharp, needle-like piece

A root-like structure

Freshwater only

Both marine and freshwater

Terrestrial

Marine only

Both sexually and asexually

Sexually only

Asexually only

By budding only

To reproduce

To filter water and capture food particles

To provide structural support

To capture prey

They are monoecious animals

They are carnivorous

They are free-swimming as medusa

They are polymorphic

Binary fission

Budding

Fragmentation

All of the above

Hydrozoa

Scyphozoa

Anthozoa

Cubozoa

They are polymorphic.

They have only one morphology, the polyp form

They only display one morphology, the medusa form

They produce sessile larvae