create flashcards about porifera
What are porifera commonly known as?
Sponges
True or False: Porifera are considered the simplest multicellular animals.
True
What type of symmetry do most porifera exhibit?
Asymmetry
Fill in the blank: Porifera have a porous body that allows water to flow through their __________.
pores
What is the primary function of choanocytes in porifera?
To create water currents and filter food particles
Which structural component provides support to porifera?
Spicules or spongin
What is the term for the body structure of porifera that is characterized by an inner layer of choanocytes?
Aquiferous system
True or False: All porifera are marine organisms.
False
What is the primary mode of reproduction in porifera?
Asexual reproduction through budding and sexual reproduction
Multiple choice: Which of the following is NOT a class of porifera? A) Calcarea B) Hexactinellida C) Cnidaria D) Demospongiae
C) Cnidaria
What is the role of the osculum in porifera?
It is the opening through which water exits the sponge.
Fill in the blank: The body of porifera is organized into a series of __________ for water flow.
canals
What type of feeding strategy do porifera utilize?
Filter feeding
True or False: Porifera have specialized tissues and organs.
False
What are the tiny, needle-like structures found in some porifera called?
Spicules
Which class of porifera is known for having siliceous spicules?
Hexactinellida
What is the ecological role of porifera in marine environments?
They provide habitat and contribute to nutrient cycling.
Multiple choice: Which of the following is a characteristic of the class Demospongiae? A) Calcareous spicules B) Siliceous spicules C) Exclusively freshwater D) All of the above
B) Siliceous spicules
What is the significance of the term ‘sessile’ in relation to porifera?
They are fixed in one place and do not move.
Fill in the blank: The larval stage of porifera is typically __________ and free-swimming.
motile
What is the primary habitat of porifera?
Aquatic environments, primarily marine.
True or False: Porifera can regenerate lost body parts.
True
What is the process by which porifera filter food from water called?
Suspension feeding
Fill in the blank: Porifera have a body plan that is primarily __________ in nature.
cellular
Which structure in porifera is responsible for the intake of water?
Incurrent canals or ostia
