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Variation & Evolution - Coggle Diagram
Variation & Evolution
Causes of Mutations
mutagens = speed up spontaneous mutations
spontaneous mutation = DNA doesn't produce exact copy of itself
Theory of Natural Selection
no. increase until no more can survive (competition)
inherited variations occur
produce large no. of offspring
"Survival of the Fittest"
Types of Mutations
chromosome mutation = large changes in structure of chromosome(s)
addition/loss of single chromosome
gene mutation = change in single gene
Theory of Evolution
Wallace
Darwin
Evidence of Evolution
show changes compared to modern organisms
show increased complexity
fossils can be aged
fossil evidence linked to environmental change
Paleontology (ross) :