Gastropods & Bivalves

What structure has teeth and is used by gastropods to eat?

• Tentacles
• Radula
• Mantle
• Filter feeder

If a disease suddenly killed most of the bivalves in a coastal area, what would likely happen to the water quality?

• Water quality would improve because there would be fewer organisms consuming algae

• Water quality would remain unchanged because bivalves are too small to make a difference

• Water quality would decline because fewer bivalves would be filtering bacteria, algae, and detritus from the water

• Water quality would improve because bivalves produce waste that pollutes the water

Tags

NGSS.MS-LS2-3

Which part of the Mollusc body contains organs?

• Foot
• Visceral Mass
• Trochophore
• Mantle

Which part of the Mollusk body is the tissue covering the body and secretes the shell?

• Mantle
• Trochophore
• Foot
• Visceral Mass

What muscle is used by bivalves to close their shells tightly to keep predators out?

• longitudinal
• retractors
• circular
• adductor & abductor

Where are chemoreceptors of terrestrial snails and slugs?

• foot

• mantle

• shorter stalks on head

• longer stalks on head

Match the parts of the bivalve:

• umbo

• E

• foot

• C

• gills

• H & I

• siphons

• A

• adductor & abductor muscles

• J

Tags

NGSS.MS-LS1-3

NGSS.MS-LS4-2

A marine biologist observes that oysters in a polluted harbor are producing more pearls than oysters in a clean bay. Based on your understanding of pearl formation, which explanation best accounts for this observation?

• Oysters in polluted water are healthier and produce better quality pearls

• The polluted water contains more irritants that trigger pearl formation in oysters

• Oysters deliberately make pearls to protect themselves from pollution

• Pearl production is unrelated to water quality and occurs randomly

What is the dominant side for shell coiling in gastropods?

• to the right, to the right, to the right, to the right(dextral)

• to the left, to the left, to the left, to the left (sinistral)

• both are dominant

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-4

Match the following

• Subclass Prosobranchia

• 
• Class Bivalvia

• 
• Subclass Pulmonata

• 
• Dorid nudibranch

• 
• Aeolid nudibranch

• 

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-3

NGSS.MS-LS4-2