Cnidarians and Porifera

What type of symmetry do sponges (Porifera) have?

• asymmetrical

• radial

• bilateral

• medial

What is the outer most layer of Porifera?

• epidermis

• gastrodermis

• mesoglea

• spongin

The level of organization cnidarians have is...

• specialized cells

• tissues

• organs

• organ systems

Tags

NGSS.MS-LS1-3

What type of symmetry do cnidarians have?

• asymmetrical

• radial

• bilateral

• medial

The hard "skeleton" structures in a sponge are called...

• Spongin

• Amoebocytes

• Spicules

• Nematocysts

Which of the following is a correct description of the Cnidarian digestive tract?

• A complete digestive tract consisting of two openings.

• A complete digestive tract consisting of one opening.

• An incomplete digestive tract consisting of two openings.

• An incomplete digestive tract consisting of one opening.

What phylum has two different forms that exist which are called the medusa and the polyp?

• Phylum Porifera

• Phylum Cnidaria

Which of the following is a correct description of the polyp body form?

• It is sessile and the tentacles and mouth point downward.

• It is sessile and the mouth and tentacles point upward.

• It is mobile and the tentacles and mouth point downward.

• It is mobile and the tentacles and mouth point upward.

What are the organelles inside the stinging cells that inject paralyzing toxins into their prey?

• pinacocytes

• lysomatocyts

• choanocytes

• nematocysts

Cnidarians can reproduce...

• sexually only

• asexually only

• both sexually and asexually

• neither sexually or asexually

Tags

NGSS.MS-LS3-2