Evolution Flashcards
What is evolution?
Descent w modification, changes in allele frequency over time (across gens)
Define Micro & Macro evo
Micro: Change in allele freq. for given species over gen. (small scale, within species)
Macro: Evolutionary changes larger scale (beyond single species)
Caused by formation of new species + extinction events
Why popn is smallest unit that can evolve
Individuals CANNOT evolve
Evolution-> changes in allele freq. within populations over time across gen.
Variation exists within popn, natural selection acts on individuals, alleles
Advantageous alleles passed onto new gen
Why variation is impt in natural selection
Genetic diff -> Variation-> must exist b4 natural selection
Var decreases chances of extinction, higher chance of species surviving diff types of env. change
How environmental factors act as forces of natural selection
How genetic variation & recessive harmful alleles is preserved in natural selection
Define biological evolution link micro & macro Evo
Explain biological, ecological, morphological, genetic, phylogenetic concepts
Explain biological, ecological, morphological, genetic, phylogenetic concepts
Explain how new species are formed
Explain how new species are formed
Allopatric speciation
Allopatric speciation
Behavioural speciation
Sympatric speciation
