Pteridophye Flashcards
(28 cards)
What is the second largest animal phylum?
Mollusca
Mollusca includes a diverse range of species found in various environments.
What type of symmetry do molluscs exhibit?
Bilateral symmetry
This means their body can be divided into two mirror-image halves.
Are molluscs triploblastic or diploblastic?
Triploblastic
This indicates they have three germ layers: ectoderm, mesoderm, and endoderm.
What type of body cavity do molluscs have?
Coelomate
This means they have a true coelom, a body cavity lined by mesoderm.
What covers the body of molluscs?
A calcareous shell
This shell provides protection and structural support.
What is the function of the muscular foot in molluscs?
Locomotion
The foot is adapted for movement in various molluscan species.
What is the mantle in molluscs?
A soft and spongy layer of skin
The mantle covers the visceral hump and plays a role in shell secretion.
What is the mantle cavity?
The space between the hump and the mantle
This cavity houses the gills and is involved in respiration and excretion.
What type of organ is the radula?
A file-like rasping organ for feeding
The radula is used by many molluscs to scrape food from surfaces.
Are molluscs dioecious or monoecious?
Dioecious
This means they have distinct male and female individuals.
What type of reproduction do most molluscs exhibit?
Oviparous with indirect development
This involves laying eggs that develop into larvae before becoming adults.
Give an example of a mollusc species.
Pila (Apple snail)
Other examples include Pinctada (Pearl oyster), Sepia (Cuttlefish), and Octopus (Devil fish).
What is the role of sensory tentacles in molluscs?
Sensory perception
These tentacles help molluscs detect their environment.
Fill in the blank: The space between the visceral hump and the mantle is called the _______.
mantle cavity
The mantle cavity plays a crucial role in respiration and excretion.
What is the second largest animal phylum?
Mollusca
Mollusca includes a diverse range of species found in various environments.
What type of symmetry do molluscs exhibit?
Bilateral symmetry
This means their body can be divided into two mirror-image halves.
Are molluscs triploblastic or diploblastic?
Triploblastic
This indicates they have three germ layers: ectoderm, mesoderm, and endoderm.
What type of body cavity do molluscs have?
Coelomate
This means they have a true coelom, a body cavity lined by mesoderm.
What covers the body of molluscs?
A calcareous shell
This shell provides protection and structural support.
What is the function of the muscular foot in molluscs?
Locomotion
The foot is adapted for movement in various molluscan species.
What is the mantle in molluscs?
A soft and spongy layer of skin
The mantle covers the visceral hump and plays a role in shell secretion.
What is the mantle cavity?
The space between the hump and the mantle
This cavity houses the gills and is involved in respiration and excretion.
What type of organ is the radula?
A file-like rasping organ for feeding
The radula is used by many molluscs to scrape food from surfaces.
Are molluscs dioecious or monoecious?
Dioecious
This means they have distinct male and female individuals.
