What do coral reefs protect shorelines against?
Answer: Storms and erosion
Describe the relationship between anemones and clownfish?
Answer: Mutualistic, share food and protect each other
Box jellies belong to which class?
Answer: Class Cubozoa
T/F Cnidarians do not have any organs.
T/F Cnidarians lack distinct tissues.
Answer: False, they have distinct tissues
T/F Coral are colonial.
T/F Sea anemonies + Hydra are colonial.
Answer: False, both are solitary.
T/F Cnidarians are triploblastic.
Answer: False, they are diploblastic
What does the ectoderm develop into in Cnidarians?
Answer: Develops into epidermis and nervous system.
What does the endoderm develop into in Cnidarians?
Answer: Develops into gastrod
What is fragmentation?
Answer: Asexual reproduction by breaking into fragments.
What methods do sponges use for reproduction?
Answer: Fragmentation or Budding
What is hermaphroditic?
Answer: Produce both eggs and sperm
How do sponges fertilize gametes?
What defines a leuconoid body structure? Example?
Answer: Very thick sponge body wall with choanocytes connected to each other.
What is hexactinellida?
Answer: Class of sponges that has glass sponges and Venus flower basket with
What does the hydrostatic skeleton allow in Cnidarians?
Answer: Rigid structure that gives animal shape and surface for muscles to
What are several functions gastrovascular cavity allows for in Cnidarians?
Answer: Gas exchange, waste discharge,
What does porifera mean?
Answer: To have pores.
Where is the mesohyl?
Answer: Middle layer of sponges
What is the mesohyl?
Answer: Gelatinous, protein-rich matrix with amoebocytes
What are spicules?
Answer: Needles of calcium carbonate or silica
T/F Cnidarians use both medusa and polyp forms to throughout its life cycle.
Answer: False, although many Cnidarians do use both a medusa and polyp form
not all of them do.
What are planula?
Answer: Ciliated larva of cniderians
Corals, sea anemones, and
What is the multinucleate hypothesis?
Answer: Metazoans arose from a multinuclear protist.
What is the colonial flagellate hypothesis?
Answer: Metazoans descended from colonial protists.
What is the polyphyletic origin hypothesis?
Answer: Sponges evolved
Acoelomates lack what?
Answer: Body cavities
Sponges are in what phylum?
What is the oldest phylum in kingdom Animalia
T/F Some sponges live in freshwater.
T/F Sponges and their larva are sessile.