Mollusca, Echinoderms Flashcards
(16 cards)
What are the main classes of Mollusca?
Bivalves, Gastropods, Cephalopods
Each class has distinct characteristics and habitats.
What type of body structure do mollusks have?
Soft body with a shell (some have an internal shell)
The shell can be external or internal, varying among different classes.
What is the primary function of the foot in mollusks?
Locomotion
The foot can also be used for feeding in some species.
How do mollusks obtain nutrition?
Filter feeders, herbivores, carnivores
Different classes of mollusks have different feeding strategies.
What respiratory structures do aquatic mollusks use?
Gills
Terrestrial mollusks typically have lungs.
What type of symmetry do mollusks exhibit?
Bilateral symmetry
This is a common trait among many animal phyla.
What is the reproductive method of mollusks?
Sexual reproduction, oviparous
Most mollusks lay eggs, which hatch into larvae.
Which group of echinoderms is commonly known as starfish?
Asteroideans
Starfish are known for their unique regeneration abilities.
What are the main types of echinoderms?
Asteroideans, Crinoids, Holothurians, Echinoids
Each type has unique adaptations and habitats.
What type of receptors do bivalves possess?
Photo receptors
These receptors help bivalves detect light and environmental changes.
What is a defining feature of Cephalopoda?
Highly developed nervous system and real eyes
Cephalopods are known for their intelligence and complex behaviors.
What type of locomotion do some mollusks use?
Swim using tentacles or foot
Some species can also glide over surfaces.
Fill in the blank: Mollusks that primarily feed on algae are called _______.
herbivores
This feeding strategy is common among many gastropods.
True or False: All mollusks have an external shell.
False
Some mollusks, like certain cephalopods, have internal shells or no shells.
What is the role of the tentacles in mollusks?
Sensory perception and feeding
Tentacles can help in capturing food and sensing the environment.
Define the term ‘Holothurians’.
Sea cucumbers
Holothurians are echinoderms known for their elongated bodies.
