BIOLOGY 1104, Carleton University (Questions & Answers) Rated 100%

Amniotes have - Four limbs Fused pelvic girdle ears no gills Amphibians have - Absence of scales shelled egg Angiosperms - flowering plants Annelids are - segmented worms Arthropods are - First land animals Arthropods are characterized by - segmented body (insects, arachnids, crustaceans) Australopiths age - 4-2 mya Bilatera - most animals belong to this class. bilaterians have: - symmetric form digestive tract one way digestive system birds have - wings with keratin featherslack of bladder endothermy no teeth chordates are - vertebrates without backbone and have a post anal tail Cnidarians have - Single opening for mouth and anus Devonians extinction happened ________ because of ________. - 359 million years ago the success of trees on land Ecdysozoa - Nematodes Arthropods Echinodermata Echinodermata - sea stars, sea urchins Eumetazoas are - "true animals" Eutherians - placental mammals first fossil in homo genius - homo habilis first fully bipedal, large brained hominid - Homo ergaster Flatworms are - Free living parasiticHominins (age, location and closest relation) - 6-7 million years ago africa humans and chimps Homo Erectus (age, location and closest relation) - 1.8 million years ago Africa homo sapiens Homo erectus were the first hominins to - leave Africa Homo Ergaster age - 1.9-1.5 million years ago Homo habilis age - 2.5-1.6 mya Humans are: - Apes with largest brains and bipedal locomotion K-Pg Extinction - Cretaceous-Paleogene extinction event 65.5 million years ago. Killed off the dinosaurs. Caused by a giant meteor impact. Allowed mammals to become dominant life form on earth. land plants evolved from - algae Living tetrapods - Amniotes Amphibians lophotrochozoa - Flatworms rotifers molluscsannelids Mammals evolved from - synapsids Marsupials - Mammals whose immature offspring complete their development in an external pouch. Molluscs are - Slugs, oysters and clams Monotremes - Egg laying mammals