Evidence for Evolution Review

Mr. Hefti – Pulaski Biology

Generation 1: 1.00 not resistant0.00 resistant

Resistance to antibacterial soap

How natural selection works

Resistance to antibacterial soapGeneration 1: 1.00 not resistant

0.00 resistant

How natural selection works

Resistance to antibacterial soap

mutation!

Generation 1: 1.00 not resistant0.00 resistant

Generation 2: 0.96 not resistant0.04 resistant

How natural selection works

Resistance to antibacterial soapGeneration 1: 1.00 not resistant

0.00 resistant

Generation 2: 0.96 not resistant0.04 resistant

Generation 3: 0.76 not resistant0.24 resistant

How natural selection works

Resistance to antibacterial soapGeneration 1: 1.00 not resistant

0.00 resistant

Generation 2: 0.96 not resistant0.04 resistant

Generation 3: 0.76 not resistant0.24 resistant

Generation 4: 0.12 not resistant0.88 resistant

How natural selection works

Peppered moths!!!

Darw

in’s

finch

es!!

!

The older fossils are found in

lower rock layers!!!

Horse evolutionas told by thefossil record!!!

DNA!!!

Similar but different!!!

Whale’s hipbones!!!

Snake’sleg bones!!!

MINNOWS &

EYELESS CAVE FISH!!!

A structure that serves the same function in two species, but is NOT derived from a common ancestral structure is said to be ANALOGOUS

Analogous structures!!!

DON’TFORGET

CHON!!!

Land

mam

mal

sm

ovin

g in

toth

e w

ater

!!!

Why the variation in color?

C.

The diagram above illustrates the change that occurred in the frequency of phenotypes in an insect population over 10 generations. A probable explanation for this change would be that over time there wasA. a decrease in the adaptive value of gene a B. an increase in the adaptive value of gene a C. an increase in the population of this insect D. a decrease in the mutation rate of gene A