Invertebrates: Phylum Mollusca- Class Gastropoda- (EXAM 2)

Question 1

Class Gastropoda

Answer 1

• under phylum mollusca
• ex) snails, slugs, limpets, abalone and conch
• can be found in marine, freshwater or terrestrial environments
• are highly sedentary
• most have a shell which is coiled or spiraled

Question 2

Operculum

Answer 2

plate that covers shell opening when animal is withdrawn

Question 3

feeding

Answer 3

a) herbivorous: graze or browse on plants
b) scavengers: feed on dead or decaying material
c) carnivorous: organism feeds on another organisms
d) detritivores: feed on waste produced by other organisms, some feed on plankton

Question 4

Carnivorous (feeding)

Answer 4

Ex) cone snails

radula: developed into a device that envenomates (stings) prey item (some have caused human fatalities: geography cone)

Question 5

Shell collecting

Answer 5

shells of many gastropods are valued by collectors

Question 6

other

Answer 6

commercial harvesting of abalone in California