rate of evolution Flashcards
what does it mean if the selection pressure is high?
rate of evolution is high
what happens if the rate of evolution is increased?
shorter generation time
warmer environments
sharing of beneficial DNA sequences
what do you need for evolution to occur?
variation
selection
time
what is selection pressure?
factor in internal or external environment
reduces reproductive success of a population
what is the effect of shorter generation time?
more generations in a set period of time
each cycle requires DNA replication
mutations occur during meiosis and DNA replication
effect of warmer climates
exters selection pressure on all organisms
heat tolerant will have an advantage carry gene on
what is horizontal gene transfer?
sharing of beneficial DNA sequences between sexual reproduction- creates variation
what does increase in variation allow in a population
adapt to changing environmental condition