Changing population characteristics 10.8

Question 1

what are selections pressures

Answer 1

these are factors that affect the organisms chances of survival or reproduction success

Question 2

What are the steps of natural selection

Answer 2

• genetic variation arise within species
• organisms whose variations prove most advantages to face selection pressures reproduce (survival of the fittest)
• inheritance of advantageous characteristics, past 3 steps occur again for millions of years
• eventually whole population shows advantagoues characteristic
• if whole process occurs many more times over millions of years evolution of new species will arise

Question 3

what is an example of modern evolution

Answer 3

• MRSA bacteria can resist antibiotics.
• evolve rapidly as when exposed to antibiotics only those resistant survive and reproduce to produce genetically identical versions of themselves