Evolution -

EvoLUtiON

First studied to be a Dr then a
clergyman...he was uninterested
in these subjects. He was more
interested in plants & animals

Who WAs DarWIn???

TraVEleD fOR 5 yeARs oN tHe hMs

BeAgLe

DarWIn ColLEcTed SpeCImeNs

wHilE StuDyINg oN tHe
gaLApaGOs iSlANdS

SpeCImeNs

GalAPagOS fiNcHEs

Who WAs DarWIn???

VerY cuRIoUs

Man!

Published On The Origin Of

Species in 1859
Kept secret
notebooks of
his ideas

Found remains of a giant
armoured animal, a
glyptodon, which he
realized looked similar to
the smaller armadillos he
saw

Fascinated with
barnacles

He studied
them for 8
years!

Open Ended

Explain who Darwin was and his significance to evolution.

What is it?

Some organisms have
favorable traits that are
well-suited to their
immediate environment.
Organisms with this
advantage are more likely
to thrive, reproduce, and
pass their traits on to future
generations than
organisms without such
traits.

MecHAniSm- NAtuRAl SelECtiON

Mutations are a major source of
genetic diversity

Genetic Diversity makes
natural selection possible!

Drag and Drop

​

Placeholder

is/are a major source of genetic diversity.

Drag these tiles and drop them in the correct blank above

mutations

evolution

naturalists

gene flow

biodiversity

AdaPtATiOnS

OcCurS OveR A LonG tiME

●Gradual

●Favorable traits increase and
less favorable decrease

●Natural selection moves the
species in a new direction

Favorable traits that
increase an organism's
chance for survival in a
particular environment

Dropdown

Favorable traits that increase an organism's chance for survival in a particular environment are called ​

Select answer

DarWIn’S tHeOrY of NAtuRAl SelECtiON

VarIaTIon

01

ComPEtiTIon

02

inHEriTAnCe
03
Individuals produce
offspring that resemble
their parents

Mutations create
variation. Some may have
beneficial variations

Those more fit to succeed
will survive and
reproduce

Multiple Select

Mutations can ...

• have no effect

• be beneficial

• be harmful

Some individuals are
better able to secure
a mate than others

SexUaL
seLEcTiOn

Multiple Select

An example of sexual selection could be...

• A peacocks large colorful tail.

• Fruit flies performing dances for a mate

• A bird singing a song

• A giraffe's long neck

A small population
with little genetic
variation becomes
isolated.

Sharp reduction in a
gene in a population
due to a major event

BotTlE NecK

Change in allele

frequency within a
population due to

CHANCE

MecHAniSmS- geNEtiC dRifT

No selection
is involved

Ex: a large
# of
people
with hazel
eyes die
during a
flood.

​Founder effect

Multiple Choice

Genetic drift is driven by chance, not natural selection

• true

• false

Multiple Choice

A few deer wander out of their native woods into a completely new park where no deer had ever been before. They go on to create an entirely new population.

• gene pool 

• founder effect

• bottleneck

• mutation

Multiple Choice

Ten years ago, in a small population of ducks, two sizes of eyes were observed, large and small. Three ducks have large eyes and 7 have small.  2 of the large-eyed ducks are randomly hit by cars and killed. Today, no large-eyed ducks are present in the population.

• gene flow

• bottleneck

• mutation

• founders

MecHAniSmS- geNE fLow

Transfer of genetic information from one breeding population to another.

CAUSES:

●Natural events (storm blows
pollen from one population of
plants to another)

●Immigration (movement INTO a
population or ecosystem)

●Emmigration (movement EXITING
a population or ecosystem)

Multiple Choice

A forest fire ignites and kills many members of a population of rattlesnakes. This is an example of:

• gene flow

• genetic drift

• mutation

Match

Match the following

• Mutation

• Gene Flow

• Genetic Drift

• Bottle Neck

• Founders Effect

Change in DNA sequence

Increases genetic variation

Usually decreases genetic variation

Population gets smaller (Natural Disaster)

Starting a new population

• Change in DNA sequence

• Increases genetic variation

• Usually decreases genetic variation

• Population gets smaller (Natural Disaster)

• Starting a new population

Multiple Choice

A population of flowers on one side of a river transports pollen to flowers on the other side of the river

• Gene Flow

• Genetic Drift

Multiple Choice

What is genetic drift in 1 word:

• random

• calculated

• especial

• darwin

Multiple Choice

when a large population is drastically reduced in size, causing a loss of genetic diversity that can have negative long-term effects.

• Founder effect

• Bottlebottom effect

• Bottleneck effect

• Founder Father effect

MecHAniSmS of EVolUTiOn

Multiple Choice

Select the best answer based on the image.

• Gene Flow

• Genetic Drift

Multiple Choice

A change in a gene

• replication

• translation

• mutation

• transcription

Multiple Choice

Mutations are important because they bring about

• death of the organism in which they develop

• genetic variation needed for a population to evolve

• benefits for the individual, not for the population

• changes in genotype, but not phenotype

NatURal SEleCtIoN cAN leAD to...

Speciation: the emergence of a
new species

Occurs when: members of a
population can no longer
successfully reproduce

Reproductive Isolation: members of
a population that live in the same
area become unable to interbreed
Geographic Isolation: portion of a population
becomes physically separated by a geographical
barrier

HOw???

Multiple Select

SELECT ALL THAT APPLY: Which of the following must be true in order for organisms to be considered the same species?

• They must be able to mate

• They must be able to produce fertile offspring

• They must have structural similaries

• They must have the same bone structure

Multiple Choice

When a population becomes divided by an event such as a new river forming, ____________ has occurred.

• Differentiation 

• Geographic Isolation

• Adaptation

• Separation

Multiple Choice

The formation of a new species is called

• Natural selection

• Struggle for existence

• Speciation

• Darwinism

Multiple Choice

The emergence of new rivers or streams is a type of ____________ isolation.

• Temporal

• Reproductive

• Behavioral

• Geographic

Multiple Choice

There are two main ways that speciation happens naturally. Both processes create new species by reproductively isolating populations of the same species from each other. What are these two types of isolation?

• geographical and reproductive

• geographical and complex

• reproductive and complex

• locational and geographical

diREcTiOnaL

StaBIliZInG

Well adapted; favors

intermediate phenotype

diSrUPtiVE

Favors 2 extremes; may

lead to speciation

Favors extremes; may be
environmental changes

PatTErNs oF sELecTIon

Multiple Choice

Panthers with teeth that are too short have difficulty capturing prey, while panthers with teeth that are too long have difficulty chewing their food. What type of selection is this?

• disruptive

• stabilizing

• directional

Multiple Choice

In a lake in South Africa, guppies are eaten by the pike fish, and the larger the guppy, the more difficulty it has escaping its pike fish predator. What type of selection is this?

• stabilizing

• directional

• disruptive

Multiple Choice

The rocks at the bottom of a stream are either black or white. The snails that live on these rocks range in color from white, to gray, to black. The fish in the stream love to munch on these snails. The fish cannot spot the black and white snails, but can easily spot the gray snails. This is an example of:

• Distorted

• Stabilizing

• Disruptive

• Directional

HarDy WeInBerG EquILibRIum

If this conditions are not met,
the population is considered to
be evolving

Multiple Choice

Which of these is a condition that MUST be met for Hardy-Weinberg equilibrium?

• extremely small population size

• no natural selection

• gene flow

• nonrandom mating

Multiple Choice

Someone steps on some bugs and randomly removes their alleles from the population. This is an example of

• gene flow

• genetic drift

• speciation

• allele frequency

Multiple Choice

A drastic reduction in the size of a population that can change allele frequencies is called

• the bottleneck effect

• the founder effect

• the gene flow effect

• the Thanos effect

Multiple Choice

Which is NOT an assumption of Hardy-Weinberg equilibrium?

• natural selection

• large populations

• no mutations

• no migration

• random mating

Multiple Choice

If a population of lizards is isolated on an island, with no new immigrants over many years, any new genetic variations are most likely to come from

• recessive alleles

• natural selection

• mutations

• speciation

Multiple Choice

If all 5 Hardy-Weinberg assumptions are true, a population is said to be in genetic equilibrium. This means

• it is evolving

• it is NOT evolving