UNIT 16- SHALLOW SEA ORGANISMS TEST REVIEW

Which of the following describes the habitat of a sponge?

• They are mobile organisms that drift with the currents as adults.

• They are sessile organisms that live attached to rock or coral.

• They are some-what sessile organisms, but are able to slide around with muscles at their base.

• All of the above

What is an advantage of sponges to living in an area with a strong current?

• Less sponges live there, so there is less competition

• So the current can bring more food to the sponge

• So the sponges can make themselves thicker and stronger

• All of the above

Which of the following is true of asexual reproduction in sponges?

• Asexual reproduction in sponges is called budding.

• Fragments of the sponge break off and are carried to another location by currents.

• Sponges that are produced by asexual reproduction are genetically identical/clones to the parent sponge.

• All of the above are correct

Tags

NGSS.MS-LS3-2

Sponges belong to the phylum _____________.

• Echinodermata

• Cnidarian

• Cephalopoda

• Porifera

_______________ are hard, spiked structures that support and maintain the structure of the sponge.

• Pinacocytes

• Spicules

• Collar cells

• Choanocytes

What is the role of collar cells in a sponge?

• to grab food particles from the water as it passes through the sponge

• to kill parasites that try to attach to the outside of the sponge

• they are used for blood circulation

• All of the above are correct

Water flows into a sponge through the ____________ and then exits through the ____________.

• Osculum ; Pores

• Collar cells ; Osculum

• Pores ; Osculum

• Spicules ; Choanocytes

Which of the following is NOT a member of the cnidarians group ____________

• Corals

• Octopus

• Jellyfish

• Sea Anemone

What type of symmetry do most cnidarians have?

• Asymmetry

• Bilateral symmetry

• Radial symmetry

• No symmetry

Which of the following is NOT a difference between the polyp and medusa body form in cnidarians?

• Medusa have a thicker mesoglea than polyps.

• Polyps are herbivores and medusa are predatory carnivores.

• Polyps have tentacles that face upward, whereas in the medusa form, the tentacles hang downward.

• Polyps live attached to something, whereas medusa are free-living.