Vocab #1
Behavior or physical characteristic that allows an organism to survive and reproduce in its environment.
Adaptation
Any difference between organisms of the same species
Variation
Process where scientists look at the half-life of chemicals contained in rocks around a fossil to determine the age of that fossil
Half-Life
Example of a homologous structure
What item is most likely to be a preserved fossil? A flower, hair/fur, a tooth, blood.
a tooth
The gradual change in species over time
Evolution
The disappearance of all members of a species on Earth
Extinction
Any change in the DNA of an organism
Mutation
Whales are most closely related to which organism? Hooved land animals, fish, lizards, sharks.
Hood land animals
What is an adaptation for an animal that lives in a swamp or a marsh?
webbed feet, swimmers, camoflage, ability to breath under water
A process by which individuals that are bvetter adapted to their environment are more likely to survive and reproduce than others that are not
Natural Selection
Missing Link
Most fossils are found in ___________ rock.
What is the half-life of Carbon-14?
5700 years
50%
The variety of organisms that inhabit the earth
diversity
Fossil
What organisms did Darwin observe in the Galapagos Islands?
Finches
During the "Who wants to live a million years" activity, the population increased its chance of survival if we increased ____________.
Diversity/Variation
5mg
22800/5700 = 4 half lives
80 start
40, 20, 10, 5
British Naturalist who formulated the theory of evolution by natural selection
Charles Darwin
Similar structures that related species have inherited from an ancestor
Homologous structure
What is an adaptation of an animal that lives in teh snowy tundra?
A thick coat (white) of fur, blubber.
Why did the white peppered moths die out?
The industrial revolution (soot) turned white birches to black - black moths were camouflaged, while white were not and thus were eaten by birds.
What is the difference between relative dating and absolute dating?
Relative - compares fossils to other fossils (location, depth, etc.)
Absolute - radioactive dating