TOPIC 5: EVOLUTION &
BIODIVERSITY
5.2 Natural Selection
1 – Means of Evolution
Read & Consider Understandings 5.2.2-5.2.4 & 5.2.6
Adaptations

Certain
adaptations make
an individual more
suited for a
particular
environment. This
leads to increased
reproduction and
the passing of the
desirable trait.
1 Populations are generally stable
despite large numbers
2 Better adapted individuals have a
competitive advantage
3 There is heritable variation within
species
4 Advantageous heritable traits become
more frequent over generations
2 – Natural Selection
Read & Consider Understandings 5.2.1, 5.2.5, & 5.2.7
Natural Selection Over Time


A well suited
population
remains largely
unchanged.
However, drastic
change may
occur “quickly”
with an
alteration in the
environment.
Darwin’s Finches

Theory – one common ancestor species, now
approximately 13 different species of finch.
Industrial Melanism
Antibiotic Resistance

Is de-escalation the only option? What other
research should be done to counteract resistance?
Works Cited





"Can You See Me? Unbelievable Animal Camouflage
Photography - Noupe." Noupe. N.p., 31 Mar. 2011.
Web. 07 Dec. 2015.
"Evolution." IB Biology. N.p., n.d. Web. 08 Dec. 2015.
Green, Jessica, and Ann Womack. "European Rabbits:
Australian Nightmare." Full Spectrum Biology. N.p., 12
June 2013. Web. 21 Aug. 2015.
Pitman, Sean D. "Natural Selection." Detecting Design.
N.p., July 2013. Web. 21 Aug. 2015.
"The Breeding of ClownFish (Lets Start Laying Eggs)."
HubPages. HubPages, n.d. Web. 07 Dec. 2015.