Transcript Chapter 4 - TeacherWeb

Chapter 4
Section 2 - Evolution
AIM and HW
• AIM: How does evolution occur by
natural selection?
• HW: 1) Complete Peppered Moths
questions
2) QUIZ on FRIDAY
3) TEST on THURSDAY
DO NOW
• In your EcoLog answer:
–What do you think…what does
natural selection mean?
AIM and HW
• AIM: How do organisms
become so well suited to their
environment?
• HW: 1) Finish article questions
2) TEST on THURSDAY –
start studying!
DO NOW
• In your EcoLog answer the
following questions:
–Who is Charles Darwin?
–How is he related to
evolution?
Darwin and Evolution
• Darwin
– natural selection
• the unequal survival and reproduction
that results from the presence or
absence of particular traits
– evolution
• a change in the genetic
characteristics of a population from
one generation to the next
Evolution by Natural
Selection
• 1) Overproduction = Organisms
produce more offspring than can
survive
Evolution by Natural
Selection
• 2) The environment is hostile and
contains limited resources
Evolution by Natural
Selection
• 3) Organisms differ in the traits
they have
Evolution by Natural
Selection
• 4) Some inherited traits provide
organisms with an advantage
• 5) Each generation contains
proportionately more organisms
with advantageous traits
AIM and HW
• AIM: Why does evolution matter
now?
• HW: 1) TEST TOMORROW
(Chapter 4)
DO NOW
• In your EcoLog, discuss the
events of the video
AIM and HW
• AIM: How does natural selection
impact future generations?
• HW: 1) TEST TOMORROW
(Chapter 4 – Sections 1 & 2)
DO NOW
In your EcoLog,
compare/contrast survival of
the fittest and natural
selection
Evolution by Artificial Selection
• Artificial Selection
– the selective breeding of organisms by
humans for specific characteristics
– EX: fruits, grain, and vegetables we eat
dog breeds
Evolution by Resistance
Evolution by Resistance
• Pesticide Resistance
–How do pests develop a
resistance to pesticides?
CLOSURE
• Explain what an adaptation is, and
provide three examples
• Explain the process of evolution by
natural selection
• Describe one way in which artificial
selection can benefit humans
• Explain how a population of insects
could become resistant to a pesticide