What is the primary habitat of Phoronis species?
A) Freshwater
B) Terrestrial
C) Marine
D) Arboreal C) Marine
Phoronis organisms are primarily known for their:
A) Shells
B) Tentacles
C) Exoskeletons
D) Wings B) Tentacles
What type of organism is Phoronis?
A) Mollusk
B) Annelid
C) Echinoderm
D) Brachiopod B) Annelid
Phoronis are typically found in which part of the ocean?
A) Deep sea
B) Intertidal zone
C) Coastal waters
D) Open ocean C) Coastal waters
The body of Phoronis is divided into which two main regions?
A) Anterior and posterior
B) Dorsal and ventral
C) Head and trunk
D) Oral and aboral A) Anterior and posterior
Which structure do Phoronis use for feeding?
A) Gills
B) Radula
C) Tentacles
D) Fins C) Tentacles
Phoronis are known to live in:
A) Sand
B) Coral reefs
C) Rock crevices
D) All of the above D) All of the above
What type of reproduction do Phoronis primarily exhibit?
A) Asexual reproduction
B) Sexual reproduction
C) Budding
D) Fragmentation B) Sexual reproduction
Phoronis larvae are known as:
A) Trochophore larvae
B) Veliger larvae
C) Planula larvae
D) Nauplius larvae A) Trochophore larvae
The main component of the Phoronis tube is:
A) Calcium carbonate
B) Chitin
C) Silica
D) Cellulose B) Chitin
Phoronis species can be found at what depths?
A) Only shallow waters
B) Only deep sea
C) Various depths
D) Freshwater only C) Various depths
Which of the following is a characteristic feature of Phoronis?
A) Jointed appendages
B) Segmented body
C) Soft-bodied
D) Hard shell C) Soft-bodied
What type of feeding strategy do Phoronis exhibit?
A) Filter feeding
B) Predation
C) Parasitism
D) Herbivory A) Filter feeding
The primary ecological role of Phoronis is:
A) Predator
B) Herbivore
C) Decomposer
D) Filter feeder D) Filter feeder
Which of the following is true about Phoronis?
A) They have a complex circulatory system.
B) They are exclusively freshwater organisms.
C) They are sessile organisms.
D) They possess a hard external shell. C) They are sessile organisms.
The tentacles of Phoronis are primarily used for:
A) Locomotion
B) Feeding
C) Reproduction
D) Defense B) Feeding
Phoronis belongs to which phylum?
A) Mollusca
B) Annelida
C) Echinodermata
D) Brachiopoda B) Annelida
The tubes made by Phoronis provide:
A) Habitat for other species
B) Structural support
C) Protection from predators
D) All of the above D) All of the above
Phoronis species are generally:
A) Large and visible
B) Small and often overlooked
C) Colorful
D) Fast swimmers B) Small and often overlooked
Phoronis has which type of symmetry?
A) Bilateral symmetry
B) Radial symmetry
C) Asymmetry
D) None of the above A) Bilateral symmetry
Phoronis can reproduce through which of the following methods?
A) Budding
B) Fission
C) Gametes release
D) All of the above C) Gametes release
Phoronis feed primarily on:
A) Plankton
B) Larger fish
C) Algae
D) Detritus A) Plankton
The Phoronis body is covered by a:
A) Calcareous shell
B) Soft cuticle
C) Chitinous tube
D) Hard exoskeleton C) Chitinous tube
Phoronis is an important part of the marine ecosystem because it:
A) Competes with fish
B) Contributes to sediment formation
C) Provides food for large predators
D) Detracts from biodiversity B) Contributes to sediment formation
Phoronis is closely related to which group of animals?
A) Mollusks
B) Annelids
C) Arthropods
D) Echinoderms B) Annelids
Which of the following statements is true regarding Phoronis?
A) They can swim actively in water.
B) They lack a defined head.
C) They have a complex nervous system.
D) They can survive out of water for long periods. B) They lack a defined head.
The feeding structure of Phoronis is called a:
A) Lophophore
B) Siphon
C) Mantle
D) Tentacle A) Lophophore
Phoronis is known to inhabit:
A) Tropical waters
B) Arctic waters
C) Both tropical and temperate waters
D) Only deep-sea environments C) Both tropical and temperate waters
What is the main threat to Phoronis populations?
A) Pollution
B) Overfishing
C) Habitat destruction
D) All of the above D) All of the above
The Phoronis tube is primarily made from:
A) Sand
B) Organic matter
C) Chitin
D) Calcium carbonate C) Chitin