Life Has A History; Evolution – Flashcards
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How many different species of living things exist today?
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30 million
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Which group of animals has the largest number of species?
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Anthropods
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How many mammal species exist today?
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4,600
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Most abundant organisms to least abundant
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Anthropods, Molluscs, Roundworms, Flatworms, Mammals
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What is biodiversity?
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the many different types of organisms that exist
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470 Million Years Ago: What was the name of the period?
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Ordovician Period
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What was the dominant predator?
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Cephalopods
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What was the first anthropod?
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Trilobites
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160 Million Years Ago: What was the name of this period?
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Middle Jurassic Period
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What large marine reptile existed?
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Opthalmosqurus
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How old is the Earth?
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over 4 billion years old
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4.6 billion years ago
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the Earth forms
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3.9 billion years ago:
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First Life
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560 million years ago:
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First multicellular life
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500 million years ago:
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First fish
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420 million years ago:
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First land plants
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225 million years ago:
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First Dinosaurs
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65 million years ago:
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Dinosaur Extinction
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130 thousand years ago:
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Modern Humans
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The best source of evidence for determining events in Earth's History is...
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Fossils
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What is a paleontologist?
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a person who studies the fossils they find to learn more about the earth long ago
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Three examples of fossils are
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Forams, Brachiopods, and Fossil Metaseavoia leaves
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What features are found in therapods?
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carnivorous teeth, long tail, three toes, three fingers
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What is a cladogram?
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diagrams used to show evolutionary relationships
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What is divergence?
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the splitting of one species into two or more species
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Two which animal are the crane and eagle most closely related?
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Archaeopteryx
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What other date do scientist use to find if organisms are related?
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Behavior, Embryology, and DNA
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What birds on the Galapagos islands were adapted to different regions?
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Galapagos Finches
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The beaks of the birds vary with what?
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the food the finches eat
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What would happen if the environment changed and only plants with larger, harder seeds survived?
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finches with larger bills would be better adapted to eating the larger, harder seeds, better chance at survival
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What is geographic isolation?
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the separation between population caused by geographic distance or barriers
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Identify the extinct creature?
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Trilobite, Ammonite
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Name two animals that have gone extinct since humans have been present..
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The quagga which was a close relative of Zebras and the golden lion tamarin which is native to a small part of the Brazilian Rain Forest
