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History and Characteristics of Life Facts about Evolution Speciation Evidence for Evolution
What is the Cambrian Explosion?
An “explosion” of multicellular life that led to the emergence of many modern animal groups, including chordates (animals with spinal chords).
Charles Darwin
Name the scientist that traveled to the Galapagos Islands in 1831
population whose members can interbreed and produce viable, fertile offspring
What is a species?
What are 4 evidences supporting evolution?
Fossil Record, Anatomical Record, Molecular Record, Artificial Selection
What is a prokaryote?
Unicellular organisms that lack membranes
around their DNA. Bacteria (any kind);
archaea.
Natural Selection
Name the theory that Charles Darwin developed based on his observations
Reproductive Isolation
This occurs when members of different populations can no longer mate successfully.
What are homologous structures?
Structures that come from the same origin; they have the same structure on the inside but different functions on the outside; evidence of a common ancestor
O2 - oxygen; photosynthesis by cyanobacteria
A gas that was NOT present on early earth is __________. What process introduced this gas into the atmosphere?
Evolution
The constant change of an organism over a long period of time is called __________.
Behavioral Isolation
Isolation caused by differences in courtship or mating behaviors.
What are analogous structures?
Structures that look similar on the outside, they have the same function; different structure and development; different origin; "solving a similar problem with a similar solution"
mitochondria
Name the organelle in charge of making energy for all cells
selection acting on any trait that affects survival or reproduction; peppered moths
Describe the theory of Natural Selection and give an example.
Coevolution
The process in which two or more species evolve in response to changes in each other
What are Vestigial organs?
Structures on modern aminals that have no current function; Examples: human tail bone, eyes on blind cave fish, appendix in humans
Mitochondria and chloroplasts likely evolved from prokaryotes that were ingested, but not digested by ancient eukaryotes. Because these prokaryotes provided a benefit for the cells – in the form of sugar or ATP – the cells they were in survived and reprod
Both are the size of bacteria, have circular DNA and plasmids, like bacteria; have small ribosomes like bacteria. Propose and explain how these organelles might have evolved.
Gradualism: assumes that big changes occur as the accumulation of many small ones
Punctuated Equilibrium: rate of speciation is not constant; rapid bursts of change and long periods of little or no change.
Name and describe two theories involving the rate of speciation.




Evolution Jeopardy

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