Life Has A History; Evolution

Life Has A History; Evolution

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