Mar Mollusk Quiz

Mollusks are characterized by the following, EXCEPT

• radial symmetry

• soft body, often covered by a shell

• organ system

• simple nervous system

Which is NOT a bivalve?

• Hardshell clam

• Eastern oyster

• Green mussel

• Queen conch (snail)

Gastropods move using their

• muscular foot

• fins

• tentacles / arms

• mouth

Select the filter-feeding mollusk:

• octopus

• squid

• oyster

• snail

Gastropods have a radula, which is

• a structure of tiny teeth (like a cat's tongue) used to scrape food off a surface.

• a drill used to drill holes into shells of other mollusks.

• a "trap door" that covers the shell opening.

• a chemical sensor for detecting food and chemical changes in the water.

Sea slugs and sea hares both have __________ towards the front of their head that look like antennas. These structures act as inverted nostrils by sensing food and other chemical changes in the water.

• rhinophores

• operculums

• pterophores

• photophores

Climate change is a threat to mollusks with shells because

• the acidic water dissolves the calcium carbonate shells.

• warm water deteriorates shells.

• it is not a threat; mollusks are resistant to the effects of climate change.

• more intense storms threaten their food sources.

Tags

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Cephalopods have highly developed nervous systems often connected to a total of ___ brains!

• 9

• 187412834710238471028570345870348573958715798375982349823749dskjafskdjflasdk

• 2

• 12

Cephalopods change skin color with the help of all of the following EXCEPT

• rhinophores

• iridophores

• leucophores

• chromatophores

Cephalopods

• feed using their arms and tentacles to move food to their mouth, where they bite the food with a hard beak

• evolved after dinosaurs, birds, and mammals

• are a group of highly venomous animals that have 8+ tentacles or arms

• have a highly developed nervous system but are not considered sentient or smart

Tags

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