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digestive system of class asteroideamost asteroids are scavengers or carnivores and feed on snails bivalves polychaets other echinoderms fish sponges
class bivalvia body in a bilohed mantle enclosed in a two-valved shell head reduced mouth with labial palps but no radula foot wedge-shaped
class gastropodabody asymmetrical depicts torsion or its effects shell coiled in most well developed head with radula large flat foot gills one or
class of mollusca - aplacophora worm-like no shell head or excretory organs mantle with chitinous cuticle or scales or spicules mantle cavity
class of mollusca - monoplacophora bilaterally symmetrical with broad flat foot and single shell mantle cavity has five to six pairs of gills six
class of subphylum uniramia - insectaclass insecta consists of nearly a million described species there are more species of insects as compared to
class of subphylum uniramia - symphylasymphyla is yet other small myriapodous group that includes around 160 described species these are also soil
class of subphylum uniramia - pauropodaa small group of uniramians there are 500 species of pauropoda explained so far the minute organisms computing
class of subphylum uniramia - chilopoda chilopoda have the centipedes the class contains some 2500 species that have been described so far they
subphylum uniramia uniramia the largest subphylum of phylum arthropods includes myriapods and insects due to the unbranched nature of the appendages
class of crustacea - malacostracamalacostraca involves most of the larger forms such as crabs lobsters shrimps etc and constitute the majority of
class of crustacea - cirripediathese crustaceans are completely marine and include the barnacles moa species are free living attached to rock and
class of crustacea - branchiurabranchiura involves only around 130 species of ectoparasitic crustaceans living mostly on the integument and gill
class of crustacea - copepodacopepoda is a huge class of small 1-5mm crustaceans occupying both marine and freshwater environments copepods form the
class pycnogonida of phylum arthropodameasures generally 3-4 mm body chiefly made up of cephalothorax abdomen being very small generally four pairs
class arachnida of phylum arthropodabody divided into cephalothorax and abdomen cephalothorax along with four 4 pairs of legs abdomen segmented or
subphylum trilobitomorphasubphylum trilobitomorpha involves the trilobites all species are extinct and the fossils point out that they were all
characteristic features of phylum arthropoda well-developed muscular system along with striated muscles attached to the exoskeleton and visceral
phylum arthropoda - classification of multicellular animalsearlier you known how the coelom evolved and the body of the coelomates got segmented
class hirudinea - classification of coelomthese are leeches number of body segments of these types of animals is fixed usually there are 34 segments
class polychaeta - classification of coelomthere are mainly marine forms with distinct head having eyes and tentacles segments have lateral
characteristic features of coelom sensory system consisting of eyes photoreceptor cells statocysts taste buds and tactile organs respiration by skin
metamerism oe segmentation in the early coelomates the coelom was not divided into segments the whole body cavity was a single space hence body
classification of multicellular animals - coelom we know earlier that the pseudocoel gave animals specific selective benefits among other things this
defects in human development1 for instance when a pregnant woman drinks alcohol her embryo is exposed to similar concentration of alcohol as is in