A
what do cephalopods consist of?
squids and octopuses
one key to the success of insects
flight
what are the 3 key features for the success of arthropods
hard exoskeleton, segmentation, and jointed appendages
what do myriapods consist of?
millipedes and centipedes
most modern terrestrial cheliceriforms are?
arachnids
one common marine cheliceriform that still exists today is?
horseshoe crab
what do decapods consist of?
lobsters, crabs, crayfish, and shrimp
what two things tie amphibians to water?
water is needed for the skin and the eggs
key characteristic of brittle star is
a distinct central disk
sea urchins and sand dollars have 5 rows of tube feet but do not have
arms
how many species of sea daises are known?
2
what are the main characteristics of reptiles?
scales which create a waterproof barrier, shelled eggs, cant control temperature, and they are ectothermic
what are the three groups of mammals
monotremes, marsupials, and eutherians
characteristics of primates
hands and feet adapted for primates, flat nails, skin ridges on fingers, large brain, short jaw, well developed parental care, complex social behavior
what animals do hominoids consist of
apes, orangutans, gorilla, gibbon, chimps, & bonobos
characteristics that humans have that hominoids don't
stand upright and walk on two legs, brains are larger portion of the body, shortened jaw and digestive track, communication through complex languages, use of complex tools, most complex social network
characteristics of hominoids
large size, long arms, short legs, no tails
adaptations of snakes
chemical sensors to feel prey vibrations, heat detecting organs, hollow teeth that deliver venom, mouth designed to swallow very large prey, and elastic skin around the mouth
when were sea daisies discovered
1986
how many species of lepidsaurs are there
7900