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WorksheetsP. Porifera
Total questions: 20
Worksheet time: 10mins
Name of D (opening at top)
Osculum
Ostia
Choanocytes
Incurrent Pore
The sponge has no organs, tissues, and no nervous system.
True
False
Flagella inside a sponge keep water moving through its body. Why is this necessary?
It prevents the sponge from floating away
It allows the sponge to feed
It allows the sponge to absorb carbon dioxide
It maintains the water pressure inside the sponge
The cells inside the sponge that have flagella (and absorb food) are called...
Collar cells
Flagella
Osculum
Pores
Sponges are primarily sessile organisms. What does this mean?
They live permanently in one palce
They move around their whole life
Which of the following type of cell digests and distributes food for the sponge?
Choanocytes
Amoebocytes
Endodermal cells
Epidermal cells
_________________ are specialized buds made to survive harsh weather.
Spicules
Plankton
Flagella
Gemmules
Which of the following terms defines how sponges can regrow lost body parts?
Budding
Symmetry
Choanocytes
Regeneration
Which of the following is NOT what a sponge skeleton can be made of?
Spongin
Calcium carbonate
Sodium chloride
Silica
What type of symmetry do sponges have?
bilateral
radial
asymmetrical
Respiration and excretion occurs by simple diffusion
true
false
What is the only free-swimming component of the sponge's life cycle?
polyp
gemmule
larvae
spicule
