Section 26-2 Flashcards
What phylum are sponges in?
Porifera
What are pores and where are pores on a sponges body
Pores are tiny openings. Pores are all over a sponges body.
What does it mean that sponges are sessile
It means that they live their entire adult life attached to a single spot
Why are sponges classified as animals
They are multicellular heterotrophs that have no cell walls and a few specialized cells.
Is this true or false? Sponges have no tissues
True
What movements of water through a sponge provide
A single mechanism for feeding, respiration, circulation and excretion
Choanocyte
Cell that uses flagella to move through the sponge
Spicule
A spike shaped structure
Osculum
A large hole at the top of the sponge
Archaeocyte
Cell that makes spicules
Where does digestion take place in sponges
Digestion takes place inside the sponges cell
Circle the letter of each sentence that is true about sponges
A) sponges are filter feeders
B) sponges reproduce only asexually
C) sponges rely on water movement to carry out body functions
D) sponges do not have a nervous system
A, C, D
How do many sponges protect themselves from predators
To protect themselves from predators they produce toxins that make them unpalatable or poisonous to potential predators
An immature stage of an organism that looks different from the adult form is called a ??
Larva
How is a sponge larva different from the adult form?
They’re different because they are motile and usually get carried away by currents before they settle in the waters floor
What are gemmules, and what is their role in sponge reproduction
Gemmules are groups of achaecytes that are surrounded by a tough layer of spicules.
Their role is to use gemmules to produce asexually.
Why do you think many sponges are colored green
Sponges are colored green because plant like organisms live in there and color it that way
What adaptations may allow sponges to survive in a wide range of habitats
The spicules focus the sunlight to produce food.
The adaptations that allow them to survive in a wide range of habitats are symbiotic organisms that carry out photosynthesis.
