Ch.12/13 Quiz Flashcards
In most sponges, the free-swimming larva produced by sexual reproduction is called a/an
Bud
Gemmule
Apopyle
Parenchymula
Plasmodium
Parenchymula
A sponge feeds by
Using a net and a current that sweeps food particles through it
Squeezing the spongocoel cavity to suck debris in and out through the osculum
Beating the flagella of collar cells to form a current; food is absorbed by collar cells
Beating collar cells form a current from osculum to pores; food is engulfed by amoebocytes in the central cavity of the sponge
None of the choices are correct
Beating the flagella of collar cells to form a current; food is absorbed by collar cells
Placozoans
Do not have a muscular or nervous system
Are flat, plate-like animals with no symmetry
Are probably advanced mesozoans
Have calcareous spicules
Have three germ layers
Do not have a muscular or nervous system
Specialized archaeocytes that secrete spongin are
Collencytes
Sclerocytes
Choanocytes
Spongocytes
Lophocytes
Spongocytes
The most complex and the most common canal system of sponges is found in the
Asconoids
Leuconoids
Syconoids
Archeocytes
Protoporifera
Leuconoids
Placozoans feed by
Sharing food produced by symbiotic algae in their diffuse tissues
Gliding over their food, secreting enzymes, and absorbing products
Filtering food that moves through them in tiny pores
Taking food in through a ventral tube, digesting it, and expelling wastes back out the tube
Taking food in through a central tube, digesting it, and moving wastes out the anus
Gliding over their food, secreting enzymes, and absorbing products
The order in which a drop of ink would pass by the structures in a sponge is
Spongocoel-ostia-osculum
Osculum-spongocoel-ostia
Osculum-ostia-spongocoel
Ostia-spongocoel-osculum
Ostia-osculum-spongocoel
Ostia-spongocoel-osculum
A pharynx and mesenteries are structures found in
Hydra
Sea anemones
Aurelia
Obelia
Cubozoans
Sea anemones
The function of the rhopalium is
Digestive
Respiratory
Food capture
Sensory
Reproductive
Sensory
Ctenophores capture food by
Nematocysts
Collenchyme
Colloblasts
Comb plates
Statocysts
Colloblasts
Which association of anthozoan traits is NOT correct?
Hexamerous parts in multiples of six
Octomerous parts in multiples of eight
Coupled septa matched across gastrovascular cavity
Hydrostatic skeleton hard coral secretions
Pedal laceration small pieces break off and regenerate new anemones
Hydrostatic skeleton hard coral secretions
The fishing tentacles in the Portuguese man-of-war are long tentacles with many nematocysts called
Dactylozooids
Gastrozooids
Gonophores
Pneumatophores
Colloblasts
Gastrozooids
Dactylozooids
Cnidarians are found most abundantly in which of the following habitats?
Shallow marine habitats
Freshwater habitats
Deep ocean habitats
Estuary habitats
None of the choices are correct
Shallow marine habitats
Which of the following is NOT a correct association?
Nematocyst - stinging organelle
Operculum - lid covering the capsule containing the coiled thread
Cnidoblast - a developing cnidocyte
Cnidocil - poison gland
Hydrostatic pressure - pressure inside capsule that forces the nematocyst out
Cnidocil - poison gland
The traditional view of cnidarians relative to germ layers is that cnidarians possess
Only one germ layer, the ectoderm, that differentiates into the two tissue layers
Two germ layers, ectoderm and mesoderm
Two germ layers, endoderm and mesoderm
Two germ layers, ectoderm and endoderm
All three germ layers including the mesoglea as it is derived from ectoderm
Two germ layers, ectoderm and endoderm
