Chapter 35 Flashcards
Name some characteristics of mollusks.
They exhibit bilateral symmetry. They undergo a trochophore state. They use radula to acquire food.
Mollusk bodies are divide into what two main regions?
visceral mass and head-foot
Which region contains the mouth and sensory structures in a mollusk?`
head
Which region contains the heart, digestive, reproductive, and excretory organs of a mollusk?
mantle
Which mollusk structure produces the hard valves or shells?
mantle
paired clusters of nerve cells controlling the locomotion, feeding, and sensory processing are located where?
in the head-foot and visceral mass
A radula can be used to
feed
The process that occurs in gastropods to produce a head that can be retracted is called
torsion
the largest and most diverse class of mollusks
gastropods
Give some examples of gastropods.
snails, conchs, and abalones
The structure of a land snail that acts as a modified lung is the ___.
mantle activity
The marine gastropod that has no shell is the ___.
nudibranch
Most bivalves are ___.
sessile
The mantel cavity of a clam is sealed except for two fleshy tubes called ___.
siphons
Clams reproduce ___.
sexually only