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describe class echinoidea in animal kingdomsand dollars and sea urchins either have flattened disc-like bodies or are somewhat spherical while they
describe class ophiuroidea in general waybrittle stars have a central disc with five long thin flexible arms that can be detached from the body at
what is class asteroidea sea stars are probably one of the most recognizable of all echinoderms often beautifully colored and symmetrical they are
describe the phylum echinodermata in detailsthe phylum echinodermata takes its name from two words of greek origin echino which means prickle or
define deuterostomes in animal kingdomcoelomate animals are thought to have separated into two divergent lines of evolution in terms of the way
describe class diplopoda and chilopoda in detailmembers of the subphylum crustacea and the subphylum uniramia have one major characteristic in common
what is subphylum crustacea and subphylum uniramiathe arthropoda are usually grouped into four subgroupings called subphyla singular-subphylum one of
describe the classification of arthropodamost arthropods also go through a growth process called metamorphosis whereby they change their bodies into
describe the phylum arthropoda and metamorphosismore than one million different species of arthropods are estimated to exist on the earth today-more
define class cephalopoda in animal kingdomthis group-including squids octopuses and the nautilus-is considered by most scientists to have the highest
explain class bivalvia in animal kingdomthis name of this class reflects the groups most distinguishing feature clams oysters scallops and mussels
what is class gastropoda in animal kingdomsnails and slugs are referred to as gastropods because of their characteristic body plan gastro is derived
explain the phylum molluska - mollusksyou are probably very familiar with members of this phylum the mollusks include the octopuses squids cuttlefish
what is class polychetae - marine wormsthe polychaetes differ from the oligochaetes in several ways the name itself suggests one of the differences
explain in details class hirudenia - leechesthis group includes the leeches most leeches grow in tropical freshwater habitats and are familiar to
explain class oligochaeta - earthworms in detailsthis group of annelids includes the earthworms oligochaetes live in the soil or in fresh water
what is phylum annelida - segmented wormsmembers of this phylum are commonly known as the segmented worms the body of a segmented worm is made of
explain protostomes vs deuterostomes breiflybranching evolutionary lines it appears that the coelomate animals separated into two divergent lines of
explain coelomatesrecall that acoelomates have solid bodies and pseudocoelomates have body cavities that form between the endoderm and the mesoderm
what is phylum nematoda - roundwormsnematodes are commonly known as the roundworms they have a pseudocoelom type of body cavity and they have a
explain pseudocoelomates in classification animal kingdomin terms of body organization pseudocoelomates fall between the acoelomates and the
elaborates class trematoda and monogenea - flukesmembers of this class are commonly known as the tapeworms they resemble a long flat tape or ribbon
define class turbellaria - flatworms members of these two classes are known as the flukes flukes are parasitic flatworms that inhabit tropical areas
what is phylum platyhelminthes - flatworms this class consists of the free-living flatworms the best known of which is the genus planaria most of the
explain the acoelomates - animals without a body cavitythe simplest group of animals that has bilateral symmetry and a solid body acoelomate is the