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28 Cards in this Set

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  • Back
Process by which modern organisms have evolved from ancient organisms
evolution
In evolution the organisms change how fast over time?
slowly
The varitey of living things.
diversity
Darwin sailed to many contients and islands and collected a varitey of organisma on the ship called what?
begale
Today scientists estimate that over how many of the species that lived on earth are extinct?
99.9%
Who was the first person to use the word fitness?
Darwin
Fitness is the combination of what and what to help an orgaism survie and reproduce in their enviorment?
Physical traits and behaviors
What is the name of the book that Darwin wrote?
The Origin of Species by Means of Natural Selection
Modern species produced through evolution and many descended from a common ancestor.
Common descent
Any inherited characteristics that increases an organisms fitness for survival.
Adaptation
Who were the two geologists who believed the earth was constantly changing.
James Hutton and Charles Lyell
Preserved remains of ancient organisms
Fossil
A record of he history of life setermined by the postion of layers of rocks.
geologic time scale
technique used to determine the age of fossils by comparing them with other fossils in different layers of rocks.
relative dating
unstabel element that decays into a more stable or non-radioactive element at a very steady rate.
radioactive element
lenght of time for half of the radioactive atoms in a sample to decay.
half life
same as radiactive dating
absoulte dating
meathod of measuring radioactive decay of a radioactive material to determine how long ago an event occured of an organism lived.
absoulte dating
what is the half liife of carbon?
5,770 years
a major division of geologic time composed of a number of periods.
era
any specified division or portion of time.
period
periods are divided into this.
epoch
tree sap that has become a rock.
amber
most fossils are found in what kind of rock?
sedimentary
large rock broken down into small particles of sand, silt or clay due to heat, cold, or rain which are compressed under water.
sedimentary rocks
early stages of development of an organism.
embryo
organ that has no uesful purpose.
vestigial organ
sructures in different organisms that develope from the same ancestor.
homologous structure