Unit 2 Test - Phylum Porifera and Phylum Cnidaria

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Which of the following is NOT an anatomical feature found in cnidarians?

C. complete digestive system

B. nerve cords

D. stinging cells

A. epidermis and gastrodermis

Sponges primarily depend on which factor for their major body functions?

B. their mobility as adults

C. water flow through the sponge body

A. endosymbiosis

D. their dioecious reproductive structures

What separates hydrozoans from other cnidarians?

A. derived from gastrodermal tissue

D. Their sexual organs are derived from epidermal tissue.

C. they are hermaphroditic

B. housed in cnidocytes

Which is contained within the mesophyll?

B. multiple pores

C. spicules composed of silica

D. a polysaccharide gel and dead cells

A. a collagen-like gel and suspended cells

Which cell type is NOT found in sponges?

B. pinacocytes

A. choanoflagellocytes

D. lophocytes

Which is NOT a characteristic of Phylum Porifera?

D. They have no body symmetry.

C. They are multicellular.

A. They are exclusively marine animals.

B. They are sessile as adults.

Sponges are known as what in the invertebrate phylogenetic tree?

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.

What type of symmetry is present in vertebrates?

C. Asymmetry

A. Radial symmetry

B. Bilateral symmetry

D. None of the above

Cnidarians typically exhibit what type of symmetry?

B. Bilateral symmetry

D. None of the above

C. Asymmetry

A. Radial symmetry

Which two phyla are the most primitive in animals?

Phylum Porifera and Mollusca

Phylum Cnidaria and Platyhelminthes

Phylum Porifera and Phylum Cnidaria

Phylum Cnidaria and Arthropoda

What is the common name for organisms with amoebocytes?

Mollusks

Arthropods

Sponges

Cnidarians

How many classes belong to the phylum Porifera?

4

5

2

3

What is the common name of Class Anthozoa?

Sea Anemone

Hydra

Jellyfish

Coral

Which is NOT a characteristic of cnidarians?

They have a nerve net.

They have a complete digestive system.

They have a gastrovascular cavity.

They have stinging cells.

What is the purpose of a spicule in sponges?

To filter water

To reproduce

To support the sponge's structure.

To capture prey

What does diploblastic mean in relation to embryonic development?

Having no layers

Having multiple layers

Having two embryonic germ layers.

Having three layers

What is a cnidocyte found in certain animals?

A cell that delivers a paralyzing sting.

A sharp, needle-like piece

A sulfur-containing protein

A root-like structure

What characterizes an endosymbiont?

Lives within the cells of another organism.

Provides structural support

Captures prey

Filters water

What role does spongin play in sponges?

Forms the skeletal structure of sponges.

A barbed, threadlike tube

A sharp, needle-like piece

A root-like structure

What type of habitat can sponges be found in?

Freshwater only

Both marine and freshwater

Terrestrial

Marine only

How do sponges reproduce?

Both sexually and asexually

Sexually only

Asexually only

By budding only

What is the primary function of choanocytes in sponges?

To reproduce

To filter water and capture food particles

To provide structural support

To capture prey

Which of the following is NOT an anatomical feature found in cnidarians?

C. complete digestive system

B. nerve cords

D. stinging cells

A. epidermis and gastrodermis

Sponges primarily depend on which factor for their major body functions?

B. their mobility as adults

C. water flow through the sponge body

A. endosymbiosis

D. their dioecious reproductive structures

What separates hydrozoans from other cnidarians?

A. derived from gastrodermal tissue

D. Their sexual organs are derived from epidermal tissue.

C. they are hermaphroditic

B. housed in cnidocytes

Which is contained within the mesophyll?

B. multiple pores

C. spicules composed of silica

D. a polysaccharide gel and dead cells

A. a collagen-like gel and suspended cells

Which cell type is NOT found in sponges?

B. pinacocytes

A. choanoflagellocytes

D. lophocytes

Which is NOT a characteristic of Phylum Porifera?

D. They have no body symmetry.

C. They are multicellular.

A. They are exclusively marine animals.

B. They are sessile as adults.

Sponges are known as what in the invertebrate phylogenetic tree?

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.

What type of symmetry is present in vertebrates?

C. Asymmetry

A. Radial symmetry

B. Bilateral symmetry

D. None of the above

Cnidarians typically exhibit what type of symmetry?

B. Bilateral symmetry

D. None of the above

C. Asymmetry

A. Radial symmetry

Which two phyla are the most primitive in animals?

Phylum Porifera and Mollusca

Phylum Cnidaria and Platyhelminthes

Phylum Porifera and Phylum Cnidaria

Phylum Cnidaria and Arthropoda

What is the common name for organisms with amoebocytes?

Mollusks

Arthropods

Sponges

Cnidarians

How many classes belong to the phylum Porifera?

4

5

2

3

What is the common name of Class Anthozoa?

Sea Anemone

Hydra

Jellyfish

Coral

Which is NOT a characteristic of cnidarians?

They have a nerve net.

They have a complete digestive system.

They have a gastrovascular cavity.

They have stinging cells.

What is the purpose of a spicule in sponges?

To filter water

To reproduce

To support the sponge's structure.

To capture prey

What does diploblastic mean in relation to embryonic development?

Having no layers

Having multiple layers

Having two embryonic germ layers.

Having three layers

What is a cnidocyte found in certain animals?

A cell that delivers a paralyzing sting.

A sharp, needle-like piece

A sulfur-containing protein

A root-like structure

What characterizes an endosymbiont?

Lives within the cells of another organism.

Provides structural support

Captures prey

Filters water

What role does spongin play in sponges?

Forms the skeletal structure of sponges.

A barbed, threadlike tube

A sharp, needle-like piece

A root-like structure

What type of habitat can sponges be found in?

Freshwater only

Both marine and freshwater

Terrestrial

Marine only

How do sponges reproduce?

Both sexually and asexually

Sexually only

Asexually only

By budding only

What is the primary function of choanocytes in sponges?

To reproduce

To filter water and capture food particles

To provide structural support

To capture prey