week 8 Flashcards
Which of the following does a mollusk use for movement?
Foot
The muscular foot of a mollusk may be adapted for which of the following?
Food capture
Digging
Locomotion
Attachment
The basic body plan of a mollusk consists of three parts: a muscular _______ (used for movement), a ______ mass (which contains the internal organs), and a ________
(which produces the shell in mollusks that have one).
Foot
Visceral
Mantle
The mollusk’s mouth may contain a protrusible, tonguelike organ that has many teeth and is used for feeding. This unique organ is called the
radula
In mollusks, food is obtained using the
radula
Mollusks use a muscular _____
(also known as podium) for movement.
foot
Match each class of mollusks with the correct description.
Polyplacophora
Gastropoda
Bivalvia
Cephalopoda
Polyplacophora- Body covered with eight overlapping dorsal plates
Gastropoda- May be terrestrial
Bivalvia- Lacks a radula
Cephalopoda- Foot modified into a series of arms
The muscular
______ of a mollusk may be adapted for locomotion, attachment, food capture, or digging.
foot
Bivalves lack a(n):
radula
Match the structure of a mollusk with its function.
1) Radula
2) Mantle cavity
3) Shell
4) Visceral mass
1-Used in feeding
2-Gas exchange
3-Protection against predators
4- Houses the digestive, excretory and reproductive organs
Which of the following are advantages of an exoskeleton?
support for the body
protection against water loss
protection from predators
What is a major disadvantage of an exoskeleton?
Restricted mobility
Which of the following accurately describes the function of the radula in mollusks?
It is used in feeding.
In many arthropods, the body segments have become fused into functional units called ____.
tagmata or tagma
Match each mollusk class with its major characteristics.
1) Polyplacophora
2) Gastropoda
3) Bivalvia
4) Cephalopoda
1- Unsegmented body with a shell made of eight sets of plates
2- Torsion during larval development
3- Two shells hinged dorsally
4- Closed circulatory system
