Marine Invertebrates 2.3 Flashcards
Soft-bodied stinging animals such as corals, sea anemones, and jellyfish. All radially symmetrical.
Cnidarians.
A phylum of marine animals that are gelatinous, zooplanktonic, and have a unique body plan.
Ctenophora.
A phylum of marine animals that includes sea stars, sea cucumbers, sea urchins, sand dollars, and brittle stars.
Echinodermata. Radially symmetric. Reproduce sexually.
A phylum of marine invertebrates that are wormlike in shape and are closely related to echinoderms and chordates. Looks like a dick.
Hemichordata
Nearly all genera of bryozoa live in colonies. Scientists refer to individuals within a colony as _______.
Zooids.
A phylum of tiny aquatic invertebrates that live in colonies; also known as moss animals.
Bryozoa.
A phylum of predatory marine worms that are a significant part of plankton worldwide. Sexually.
Chaetognatha.
Kee–tahg–nah—tha
Invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin.
Arthropoda
Most mollusks possess a tongue-like structure called the ______, which helps in feeding.
Radula.
A large phylum of invertebrate animals that have soft bodies and are often protected by a shell (such as snails, clams, octopuses or squids).
Mollusca.
A phylum of segmented invertebrates, also known as segmented worms, that includes earthworms, leeches, and marine worms.
Annelida
Invertebrate organisms with a flat, soft body.
Platyhelminthes.
A phylum of microscopic, unsegmented, bilaterally symmetrical invertebrates that are mainly found in freshwater
Rotifera.
________ refers to the evolutionary history of a group of organisms, such as a tribe or a racial group.
Phylo.
A taxonomic rank that classifies organisms into groups based on shared characteristics, evolutionary relationships, or both
Phylum (singlar)
Phyla (plural)
____________is the scientific term for the phylum of animals that includes sponges, essentially meaning “pore-bearing” organisms.
Porifera. Radial symmetrical; asymmetrical.
Sponges contain specialized cells called choanocytes that possess __________.
Flagella.
Porifera: The beating of the flagella draws a current of water through the numerous pores called ______ present all over the body.
Ostia.
Minuscule pores present on the body walls of sponges.
Porifera: The water flows out through a large, single opening called the __________.
Osculum.
They filter organic matter through the current of water that passes water through their body. Therefore they are called ________.
Filter feeders.
Cnidarians have tenctacles that have stinging cells called ________.
Cnidocytes.
(Nie–doe–sights)
Cnidarians exhibit two forms of structures: the ______ and ______.
Polyp & medusa.
Polyps are stationary and cylindrical in shape with opening toward the top. The medusa are mobile and bell shaped with the opening toward the bottom.
Ctenorphora capture their prey by using sticky cells called _________ on their tentacles.
Colloblasts.
Echinoderms possess a unique system called the _________. They have rows of hollow tube feet, which draw water. These filled tube feet help the animals to move and grab prey.
Water vascular system.
