Phylum Cnidaria test
Cnidarians are dimorphic, meaning they have
2 body shapes
Dipoblastic
2 tissue layers
Hydrozoans
A class of Cnidaria where most of the organisms alternate between polyp and medusa except hydras, which are only polyp. They can reproduce both asexually and sexually.
The class of Cnidarians that typically live only as polyps
Anthozoa
No to kill humans in just a few minutes
Box jelly
Characteristics of cnidarians include all of the following except
Choanocytes
The Cnidarians inner layer of tissue is specialized for
Digestion
The outer layer cell of Cnidarian is the
Epidermis
A jellyfish may be able to regenerate a tentacle if it has been removed
False
Cnidarians can only be found living in colonies
False
Jellyfish have no predators
False
True or false: A group of jellyfish is called a smack.
False
Scyphozoans
Group of cnidarians,all marine, polyp stage is greatly reduced, free swimming medusae is up to 2 m in diameter. (Jellies,sea nettles)
Cnidarians that typically build a skeleton of calcium carbonate belong to the class
Hydrozoans
Which of the following is not sessile as an adult
Lions mane
Can spear a sea anemone's prey
Nematocysts
Sponge Amoebocytes: Cnidarians:
Nerve cell
The movement of cnidarian are coordinated by there
Nerve that
Nematocysts use a ______ to paralyze prey
Neurotoxin
Sensory structures specialized to detect gravity
Statocysts
Planula larvae of the moon jellyfish
Swim freely through the water
Characteristic associated only with Cnidarians
Tentacles with stinging cells
Both sponges and cnidarians exhibit a tissue level of organization
True
Cnidarians have Radial symmetry and are cephalized
True
Coral reefs play a major role in the marine ecosystem
True
The Great Barrier Reef is so large that it can be seen from outer space
True
True or false: Polyps are a body form of cnidarians that are specialized for swimming.
True
True or false: The life cycle of anthozoans includes medusae, planulae, and polyps.
True
True or false: cnidarians Cnidarians are characterized by stinging spicules.
True
Corals exist in a symbiotic relationship with
Zooxanthellae
cephalized
having a head
Coral reefs occur in areas where there are
high levels of light
Scyphozoans spend most of their lives as
medusae
Aurelia aurita
moon jellyfish
Many cnidarians have two distinct life stages called
polyp and medusa
sea anemone are
polyp forms of cnidarians
A hydra has ______ symmetry
radial
Anthazoans include organisms known as
sea anemones and corals
