characteristics and diversity of arthropods and echinoderms

Discover arthropods and echinoderms! This biology worksheet covers their unique characteristics and diversity.

true of arthropods most diverse group of multicellular animals jointed appendages segmented bodies some have gills can undergo metamorphosis not true of arthropods tough endoskeleton pseudocoelomates closed circulatory system Crustacea crabs and lobsters two or three body sections and most are aquatic Chelicerata two body parts and no antennae spiders horseshoe crab Insecta head, thorax, and abdomen 3 pairs of legs grasshopper and beetles Chilopoda centipede each segment contains one pair of legs Diplopoda each segment contains two pairs of legs millipedes Global warming has allowed the mountain pine beetle to survive _ and has damaged pine trees in the White River National Forest in Colorado. further north and east further north and higher altitudes further west and east further south and lower altitudes true of echinoderms spiny skin water vascular system coelomates move with tube feet 5-part radial symmetry larvae have bilateral symmetry not true of echinoderms exoskeleton protostomes Crinoidea filter feeders capture plankton on feathery arms sea lily, feather star Asteroidea sea star stomach pushes out the mouth onto prey and release digestive enzymes then completes digestion inside the body Ophiuroidea filter feeders or detritivores with long arms and flexible joints brittle star Echinoidea 5 part jaw-like structure to scrape algae off rocks sea urchins Holothuroidea cylindrical, rubbery body sea cucumber