Fill in Blank
The name for the algae that live inside a coral polyp is a _________.
Zooxanthallae
animals without backbones
invertebrates
In cnidarians, body structure with a mouth, tentacles and digestive cavity; lives attached to a substrate.
Polyp
Which of the following is a planktonic in its adult stage?
a. Jellyfish
b. sea anemone
c. hydroid
d. elkhorn coral
a. Jellyfish
The large reef-building corals grow only in tropical waters because of the warm temperatures and
a. plentiful sunlight
b. room for more growth
c. greater water pressure
d. fewer predators
a. plentiful sunlight
An adult sea anemone lives as an attached _________.
Polyp(s)
multicellular organisms characterized by two cell layers, sac-like digestive tract, tentacles, radial symmetry and a nerve net.
Cnidarians
Close relationship between different species, usually beneficial.
Symbiosis
In the cnidarians, oxygen and CO2 gas exchange occurs through the
a. gills
b. lungs
c. mouth
d. cell membrane
d. cell membrane
a. share the same habitat
b. have stinging tentacles
c. are tropical
d. are planktonic
b. have stinging tentacles
The Portuguese man of war is a dangerous colonial _____________.
Hydroid
in cnidarians, and echinoderm, body plan in which appendages are arranges around a central point.
radial symmetry
Organisms that live attached to one another by a thin membrane and so have shared nutrition.
Colonial Animals
The cnidarians ave tentacles that grow in a ring around a central mouth, an arrangement known as
a. symbiotic
b. planktonic
c. colonial
d. radial symmetry
d. radial symmetry
a. reproduction
b. locomotion
c. protection
d. ingestion
c. protection
The jellyfish's umbrella shaped structure is the _____________.
Medusa
in cnidoblastes, coiled thread with a barb; usually toxic
nematocyst
Dinoflagellate algae that live symbiotically within coral polyps.
Zooxanthellae
Inside each stinging cell of an anemone is a coiled thread with a barb at the end called a
a. cnidoblast
b. cilia
c. nematocyst
d. zooxanthellae
c. nematocyst
The basic structure of the coral animal is the
a. polyp
b. medusa
c. nematocyst
d. cnidoblast
a. polyp
The stinging cells inside tentacles are called ____________.
Cnidoblasts
Planula
Cnidarian, colonial animal composed of different polyps that function together as a single organism.
Hydroid
a. nematocysts
b. mesoglea
c. nerve net
d. zooxanthellae
c. nerve net
Which of these organisms with tentacles is LEAST realted to the others
a. sea anemone
b. brain coral
c. octopus
d. Portuguese man of war
c. octopus