50 terms

BIO 103 Exam 3

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The Triassic lasted between _ and _ mya
250, 200
The Jurassic lasted between _ and _ mya
200, 145
The Cretaceous lasted between _ and _ mya
145, 65
The Cenezoic started _ mya
65
The two moderm type of dominant Cephalopods are _ and _. They emerged in the _ and _ boundary.
Squid, Octopi, Jurassic, Cretaceous
_ _ Cephalopods developed in the Triassic Jurassic boundary
Coil Shelled
_ Cephalopods formed in the Cretaceous
Ammonoid
During the "Age of the Dinosaurs" the Cephalopods dominated the seas during the _
Cretaceous
The "Age of the Dinosaurs" lasted from the late _ and ended with an extinction event at the border between the _ and the _.
Triassic, Cretaceous Cenezoic
In the Cretaceous, the only type of Synapsids that were around were _.
Mammals
The defining characteristic of mammals when compared to other reptiles and synapsids is that they reproduced in a process that did not involve _
Eggs
_ Bearing Plants and _ dominated during the Jurrasic
Cone, Ferns
Flowering plants dominated in the _, but developed at the end of the _
Cretaceous, Jurassic
metamorphasis
The initial pollinators of flowering plants were insects that had advanced stages of _.
Plesiosaurs
_ dominated in the Jurassic and the Cretaceous. They were the largest predators of the seas.
Mosasaurs, Cretaceous
_ replaced Plesiosaurs as the dominant predators of the seas in the late _
monitor
Mosasaurs are most closely related with _ lizards
bipedal, four
In the late triassic, the first dinosaurs were characteristically _ when considering locomotion. Over time, in the mid jurassic, most dinosaurs walked on _ legs.
Stegosaurus
Herbivorous dinosaurs with a four-legged posture. Began with spikes on its back but eventually developed big plates that made the animal look large. Tail spikes used for defense.
Sauropod
Herbivorous dinosaur with enormous tails and necks with a four-legged posture. They had columnar legs and a small head. Reached 180 to 200 feet in length and sustained their bodies solely with leaves.
Cretaceous
birds became toothless int he _
Anklyosaurs
Herbivorous dinosaurs with a four-legged posture. Began with spikes on its back but eventually developed big plates that made the animal look large. Had a massive mace like tail that could be used for defense
Ceratopsians
Four-legged herbivorous dinosaur with a shield of bone in the neck and five horns on the head. Some were the size of modern elephants.
Hadrosaur
duckbilled dinosaur that could walk on fours or run bipedally. Flattened snout that contained an array of chewing teeth.
Tyrannosaurus Rex
The largest carnivores of the late cretaceous. Original posture of two legs but the arms were too small to be used in locomotion.
Birds, Placentals, Marsupials
After the extinction event 65 mya, the survivors were several lineages of _, and two forms of mammals: _ and _.
Marsupials
Live birth first evolved in _ but then translated to live birth within all mammals.
pouches
Marsupial females have _ that allow the young to develop for a little longer slightly after birth
Kangaroos, Possums, Tasmanian Devils
_, _, and _ _ are the three key types of marsupials that are dominant today.
Devils
Extremely aggressive marsupial predators the size of badgers
Kangaroos
Terrestrial marsupials that are herbivorous and hop on two hind legs. Some live in trees.
Possums
_ are marsupials that are smaller and centered in trees.
South America, Australia
Possums were first found in _ _ and then in _
Terror Birds
_ _ were Cenezoic birds that lost the power of flight but became large terrestrial predators instead.
placentals
After the K-T extinction, the _ were the mammals that dominated the northern continents.
Placentals, marsupials
After the K-T extinction, both _ and _ dominated the southern continents.
north
Once a land bridge formed between north and south america, placentals from the _ dominated and outperformed most southern animals
Armadillos, South
_ first developed in _ America. They had bony protective armor, are relatives of anteaters and sloths, and have tubular snouts with weak teeth lacking enamel.
Perissodactyl
_ mammals evolved hooves on their toe tips, developed high crowned teeth, and peaked in diversity between 30 and 40 mya.
Elephants
_ were a couple of feet long in Africa but increased in size and developed longer trunks.
Artiodactyl
A _ is a hoofed type of animal that maintains most of its power on its third and fourth toes.
Octopus
A _ has a reduced body size and a malleable mantle sac behind the head, allowing for easier movement and predation
Squid
A _ is hydrodynamic cephalopod with either short arms and two long tentacles.
Artiodactyl
A Whale is a type of _
Subcontinent, Asia
Whales first developed in an area between the Indian _ and _
Carnivorans
_ evolved right after the astroid extinction event and were the first predators to develop specialized teeth for predation
Bats
Placentals that evolved when dinosaurs ruled the earth in the late Cretaceous and evolved true flight.
Rodents
Small placentals with growing incisor teeth to open nuts and fruits. They compose the largest number of mammalians
Primates
Placentals that evolved 60 mya that ate fruits and arthropods. Most have big toes and thumbs that were opposable.
Monkeys
Large primates that had larger brains and greater intelligence that are primarily found in the tropics.