what are the key characteristics of the phylum annelida?
182516
['Symmetry and Size. Annelids are all bilaterally symmetrical animals. ... ', 'Coelom. ... ', 'Body wall. ... ', 'Parapodia. ... ', 'Nervous system. ... ', 'Sense organs. ... ', 'Circulation and respiratory structures. ... ', 'Segmental organs.']
256678
Like flatworms, annelids have a mesoderm with muscle, a central nervous system, and an excretory system. ... In addition to a more specialized complete digestive system, annelid worms have also evolved body features not found in flatworms or nematodes.
1241541
['Skeleton more or less bony, vertebrae numerous.', 'Skin with mucous glands and embedded dermal scales.', 'some without scales.', 'Paired fins.', 'Mouth with many teeth (some toothless).', 'jaws present.', 'Respiration by gills supported by bony gill arches and covered by a operculum.']
118657
This group of organisms has the following characteristics: they are aquatic, they have tentacles, they have a single body opening they have two body layers and are, for the most part, radially/biradially symmetrical.
995505
['Seven Characteristics of Living Organisms. Nutrition, excretion, respiration, sensitivity, reproduction, growth, movement.', 'Nutrition. ... ', 'Excretion. ... ', 'Respiration. ... ', 'Sensitivity. ... ', 'Reproduction. ... ', 'Growth. ... ', 'Movement.']
183087
Adult lancelets retain all five key characteristics of chordates: a notochord, a dorsal hollow nerve cord, pharyngeal slits, an endostyle, and a post-anal tail.
1116946
Annelids have a true coelom, that is, one that is lined with cells originating from the embryonic mesoderm . The coelom is fluid-filled, which creates hydrostatic (water) pressure and acts as a hydrostatic skeleton .
131331
Helobdella sp. Leeches are segmented parasitic or predatory worms that belong to the phylum Annelida and comprise the subclass Hirudinea. They are closely related to the oligochaetes, which include the earthworm, and like them have soft, muscular, segmented bodies that can lengthen and contract.
411243
['They do not have a backbone.', 'They are multicellular. ... ', 'They have no cell walls, like all other animals.', 'They reproduce by two reproductive cells, or gametes, coming together to produce a new organism of their species.']
1157953
Most mollusks have tentacles for feeding and sensing, and many have a muscular foot. ... Different classes of mollusks have different ways of obtaining food. Annelids are segmented worms such as earthworms and leeches. Annelids have a coelom, closed circulatory system, excretory system, and complete digestive system.
1052237
Coelentrata have radial symmetry, Annelida have bilateral symmetry through out the life stages. Porifera do not possess defined symmetry like other animals.
991591
['They are eukaryotic and multicellular.', 'Their cells have cellulose walls.', 'Majority have transport system.', 'They have photosynthesis hence autotrophic.', 'Reproduction is both asexual and sexual.', 'They show alternation of generation.']
1268567
['abiotic (non-living) ones, namely light (or lack thereof), pressure, currents, temperature, oxygen, nutrients and other chemicals; and.', 'biotic ones, that is, other organisms that may be potential predators, food, mates, competitors or symbionts.']
8884
Annelids are members of the protostomes, one of the two major superphyla of bilaterian animals – the other is the deuterostomes, which includes vertebrates.
276673
['They are bilaterally symmetrical.', 'They are triploblastic, which three layers.', 'They show organ system grade of organisation.', 'The body is soft and unsegmented.', 'Body is divisible into three regions – head, a visceral mass, and ventral foot.', 'Body is covered by a mantle and shell.']
859267
['Choanocytes.', 'Water canal (aquiferous) system.', 'Organic and inorganic skeletons.', 'Totipotency.', 'Plasticity.']
283198
['Radially Symmetrical.', 'Body multicellular, few tissues, some organelles.', 'Body contains an internal cavity and a mouth.', 'Two different forms exist, medusa and polyp.', 'Reproduction is asexual or sexual.', 'Has a simple net like nervous system.', 'Has a distinct larval stage which is planktonic.']