marine invetebrates Flashcards
what is the phylum that has
asymmetry, no segments, no tissue layer and give an example of an animal in this phylum.
Porifera. sea sponges
What are some characteristics of a Sea Sponge?
They have no tissue layers, no segments and can be asymmetrical or radial in symmetry.
They have many internal cavities and are porous
What are some characteristics of cnadiria
Cnadarias are diplobalstic, they are radial in symmetry and have no segments. An example would be a jelly fish.
What is phyla is dorsal ventrally flattened, triploblastic and have bilateral symmetry ?
Platyhelminthes
What are some characteristics of the Platyhelminthes Phyla ?
They are triploblastic, are bilaterally symmetrical, have no segments and are dorsally ventrally flattened.
What phyla has triploblastic, bilateral symmetry, no segments and have features like a radula and a muscular foot?
Mollusca
What are some characteristics of the Nemertea Phyla?
They are triploblastic, bilaterally symmetrical and have no segments
What differences are there between bivalves and gastropods in the Mollusca phyla
bivalves contain 2 shells and are usually filter feeders. They are sessile and uses byssal threads to attach onto surfaces.
Gastropods usually have 1 shell and are active feeders and some are predatorial. They usually have a radula.
What Characteristics does annelids have?
Annelids have bilateral symmetry, they have segments and are triploblastic. They can also become errantia or sedentaria depending on the environment.
What phyla has bilateral symmetry, triploblastic, segemented and have sensory structures on head.
Annelida
What is an example of an Annelid?
Bristle Worm
What are the appendages called for annelids that errant swimmers in the polychaeta class?
These structures are known as parapodia, they aid in locomotion and can also help with gas exchange.
What are some characteristics of Arthropods?
Arthropods are Triploblastic, they have bilateral symmetry, and are segmented.
What are some features in Arthropods?
In the sub-phyla crustacea, they have chitinous exo-skeleton and jointed appendages
What Phyla are segmented, are triploblastic and are bilaterally symmetrical.
Arthropoda
What characteristics do Echinodermata’s have?
They are triploblastic, they are radially symmetrical (penta-radial as adults) and are not segmented.
Give an example of a Echinoderm, and state some features that they may have.
Star fish, sea urchins, they have rough skin and tube feet.
What are some Features of a Chordate?
Chordates are triploblastic, they are bilateral and have no segments. They also possess a notochord and a dorsal nerve chord.
What phyla is triploblastic, have no segements and are bilateral and possess pharyngeal slits and notochords.
Chordata
In the sub phyla, Urochordata, what are some features these animals possess?
they have thick acellular body coverings.
What is the phyla of a creature that have rough skin, radial symmetry ?
Echinodermata
What is the Phyla of a creature that has multiple holes and has radial symmetry ?
Porifera
What is the Phyla of a creature that has a muscular foot, and 2 shells
Mollusca (bivalve)
What is the phyla of a creature that is a elongated round worm ?
Nematoda
What are some characteristics of a Bryozoa ?
Bryozoa’s are diploblastic, they have no segments and are bilateral. They are usually found in a colony of zooids and are suspension feeders
What is the phylum of a bilateral, diploblastic creature with no segments. that filter feed and do NOT contain nematocysts?
Bryozoa
