Natural Selection Review

Natural Selection Unit Review

Tomorrow, Friday March 31 will be the final assessment.

This will help you review and understand what we have learned about in this
unit.

Multiple Select

I am going to be here tomorrow

• Yes. And Ill take the assessment then

• No. So I am going to go up to the teacher and get the instructions to take it now

Unit Question

Activity 2

Natural Selection: Lesson 1.2

Why do populations change over time?

Chapter 1 Question

Activity 2

Natural Selection: Lesson 1.2

What caused this newt population to become more poisonous?

Vocabulary

Activity 1 - Screen 2

Natural Selection: Lesson 1.2

a group of the same type of organism living in the same area

population

What do you
notice about
these
butterflies?

What is
similar? What
is different?

Open Ended

What are 3 observations you can make about those butterflies:

What is the same? Different?

Vocabulary

Natural Selection: Lesson 1.2

a specific characteristic of an individual organism

trait

Activity 2 - Screen 2

1. What is the

Organism

2. What is the

feature?

3. What is an

example of a
trait?

Open Ended

Look at the previous slide's historgram:

1. What is the organism?

2. What is the feature?

3. What are the traits?

Vocabulary

Activity 3

Natural Selection: Lesson 1.3

any difference in traits between individual organisms for a given feature

variation

Vocabulary

Activity 3

Natural Selection: Lesson 1.3

the number of individuals with each trait in a population

distribution

1. Is the

variation High
or low?

2. Is it

distributed left
or right?

3. What does it

mean if its
distributed
left?

Open Ended

For Population A:

1. Is the variation High or Low? (High=greater than 5 traits)

2. Is it distributed more to the left or right?

3. What does it mean if its distributed left? More or less fur?

Open Ended

For Population B:

1. Is the variation High or Low? (High=greater than 5 traits)

2. Is it distributed more to the left or right?

3. What does it mean if its distributed Right? More or less fur?

Vocabulary

Activity 3

Natural Selection: Lesson 1.3

a group of individuals born and living at about the same time

generation

Key Concept

Activity 3

Natural Selection: Lesson 1.3

1. A population can be described by the traits

present and by the number of individuals
who have each trait.

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Key Concept

Activity 1

Natural Selection: Lesson 1.4

2. The number of individuals with each trait in

a population can change over time.

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Vocabulary

Activity 2 - Screen 2

Natural Selection: Lesson 1.4

everything (living and nonliving) that surrounds an organism

environment

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Natural Selection: Lesson 1.4

Each of these environments includes many
living things, such as plants and animals, and
nonliving things, such as rocks and water.

Activity 2 - Screen 2

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Vocabulary

Natural Selection: Lesson 1.4

a trait that makes it more likely that an individual will survive in

a specific environment

adaptive trait

Activity 2 - Screen 2

Multiple Choice

What is an adaptive trait?

• a trait that makes it more likely that an individual will survive in a specific environment

• a trait that makes it less likely that an individual will survive in a specific environment

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Vocabulary

Natural Selection: Lesson 1.4

a trait that makes it less likely that an individual will survive in

a specific environment

non-adaptive trait

Activity 2 - Screen 2

Multiple Choice

What is an non adaptive trait?

• a trait that makes it more likely that an individual will survive in a specific environment

• a trait that makes it less likely that an individual will survive in a specific environment

Multiple Choice

In a freezing cold environment with no predators, a non-adaptive trait for ostrilopes would be

• Low Fur

• High Fur

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1. What are the adaptive

Traits If the environment

changes from being at

Temperature 8 in

Population A to

Temperature 1 in

population B?

Open Ended

WHat are the adaptive traits in the previous example?

Why are those traits adaptive?

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Key Concept

Natural Selection: Lesson 1.5

3. Over many generations, individuals with

adaptive traits become more common in a
population, while individuals with
non-adaptive traits become less common.

Activity 2 - Screen 2

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Key Concept

Activity 2 - Screen 2

Natural Selection: Lesson 1.5

4. There are factors that affect the survival of

an organism in a specific environment
called selective pressures

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Key Concept

Activity 2 - Screen 2

Natural Selection: Lesson 1.5

5. Whether or not a trait is adaptive depends

on the environment.

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Given everything
we’ve learned about
populations,
variation, and trait
distribution, let’s
review some
research evidence
about a rough
skinned newt
population.

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Variation? High: All of the traits
are present

Distribution? Distributed
towards the left, most newts have low
amounts of poison

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Natural Selection: Lesson 1.6

Activity 3 - Screen 1

Variation? High: Most of the traits
are present

Distribution? Distributed towards
the Right, most newts have low amounts of
poison

Adaptive Traits?
Traits 8, 9, and 10 are the highest!

Non- Adaptive Traits?
Traits 1,2, and 3 do not survive!

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Natural Selection: Lesson 1.6

What are some reasons you could think of that would drive
this change in poison levels among the rough skinned newt?

Activity 3 - Screen 1

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What if I told you…

50 generations ago, snakes were introduced into the
environment of the rough-skinned newt. These
snakes are predators. They eat newts.

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Cause and Effect

Natural Selection: Lesson 1.6

6. Biologists analyze data about environmental

conditions (the causes) to explain changes
in the distribution of traits in populations
(the effects).

Key Concept

Activity 2 - Screen 2

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What is the
organism?

What is the Feature?

What is the ONLY
trait after 50
generation?

Open Ended

What is the organism?

What is the Feature?

What is an example of a trait?

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If this is the initial population

And this is the final population.

Predict, What is the Cause of
this change?
THINK: Color of landscape,
Selective Pressures?

Open Ended

What is the selective pressure in the previous example?

Why is Yellow 7 the adaptive trait?

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Another Example

What is the
organism?

What is the Feature?

What is the ONLY
trait after 50
generation?

Open Ended

What is the organism?

What is the Feature?

What is an example of a trait?

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Predict, What is the Cause of
this change?
THINK: Weather? Rainfall?
Selective Pressures?

Open Ended

What is the selective pressure in the previous example?

Why is Water storage 9 the adaptive trait?

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What is the cause of this change?

Open Ended

Why did the newt population change over 50 generations? What is the selective pressure? Adaptive Traits?

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These next slides will
help prepare you for PBL
1 questions on
tomorrow’s assessment.

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Multiple Choice

If a fish has small spots, it would most likely survive in an environment that...

• Has large rocks

• Has small rocks

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Multiple Choice

What did the environment change to?

• Having small rocks

• Having Large rocks

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Multiple Choice

Answer the question on the previous slide

• A

• B

• C

• D

Nope Statement 1

NOPE STATEMENT 1:  "will change the insert trait here if they need to."

Like humans, other living organisms can't just become what they need to. Humans can't simply say, "huh, today I want have black hair". That's not how this works here, bud. Definitely a nope statement.

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Vocabulary

Activity 5 - Screen 2

Natural Selection: Lesson 2.1

an instruction for making a protein molecule

gene

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Vocabulary

Natural Selection: Lesson 2.1

a type of large molecule that performs important functions

inside organisms

protein molecule

Activity 5 - Screen 2

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How does a jelly get the gene for glowing? When a pair of adult
jellies reproduce, each one passes down genes to the offspring.
Genes are found on chromosomes and chromosomes come in
pairs. An organism has two copies of any given gene because
there is one copy on each chromosome in a pair. However, the
two copies of any particular gene can be the same version or
different versions. These different versions of a gene are called

alleles. When jellies reproduce sexually, each parent passes

down one of each of their chromosomes (with all their genes on

it) to the offspring. If at least one of the adult jellies has the

version of the gene that is instructions for GFP, then that gene
could be passed down to the offspring. Offspring with that gene

will have cells that produce GFP, so they will glow, also.

Open Ended

If a parent has the GFP gene, will the offspring get that gene? Why or why not?

Open Ended

What is the perecent change that the offspring will have a long nose?

Key Concept

Activity 2

Natural Selection: Lesson 2.2

7a. Genes are instructions for making protein

molecules and protein molecules
determine an organism’s traits.

Vocabulary

Activity 3 - Screen 3

Natural Selection: Lesson 2.3

the process by which the distribution of traits in a population changes over many generations

natural selection

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Key Concept

Natural Selection: Lesson 2.4

8. Individuals with adaptive traits are more

likely to live longer and have offspring;
individuals with non-adaptive traits are
more likely to die without having offspring.

Activity 2 - Screen 2
Number of
Offspring

Blue 1

Blue 4

Yellow 7

Yellow 10

Trial 1

0

2

8

0

Trial 2

3

0

2

3

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This next example is an example of a PBL 2

Question

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Multiple Choice

If the fox is brown, which environment would they be able to hunt better in?

• Brown

• White

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Open Ended

One of the answer choices says, "the fox changed to become brown"

Why is this answer a problem?

Multiple Choice

Answer the question now!

• A

• B

• C

• D

Once again, an organism can't just be decide: "Wow. Check out those newts with high poison levels. Like just the other day Gerry got eaten by a frog but then sort of... walked out like it was nothing. I want to be just like them. Initiate powerup to poison level 10" ~gets eaten and digested by a frog because that's not a thing.~

NOPE STATEMENT 2: "so the trait changed to have different trait" Or basically the organism changed to have the adaptive trait.

Nope Statement 2

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What Might this look like!

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Key Concept

Activity 4

Natural Selection: Lesson 3.2

9a. Mutations are changes to genes that can

lead to changes to protein molecules,
which can result in changes to traits.

SLIDESMANIA.COM

These two histograms show the initial distribution of fur traits in two

populations from an earlier Sim activity.

In both cases, the ostrilopes’ environment became much colder and

the populations did not experience any mutations.

This population was able to
survive and higher fur
became more common

This population
died out after 17
generations…

The temperature was changed to 1 (coldest)

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Mutations
introduced new
traits. Some of
those traits were
adaptive and
become more
common in the
cold environment.

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Key Concept

Activity 4

Natural Selection: Lesson 3.2

9b. Mutations to genes can sometimes

introduce new traits into a population.

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Key Concept

Activity 4

Natural Selection: Lesson 3.2

9b. Mutations to genes can sometimes

introduce new traits into a population.

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Key Concept

Activity 2

Natural Selection: Lesson 3.3

10. A new trait will only become more

common in a population if it is adaptive.

*See Key Concept 5

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This next question is a PBL3 Question

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Multiple Choice

If the environment is warm, which type of blubber would be an adaptive trait?

• Low

• Medium

• High

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If there were
mutations in

the

populations

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Multiple Choice

Answer the previous quesiton!

• A

• B

• C

• D

Nope Statement 3

Nope Ideas # 3: Hummingbirds with long beaks are more likely to survive, so hummingbirds with short and medium beaks began to have offspring with a mutation in its genes for the long-beak trait so that their offspring would have a better chance to survive.

Nope Statement 3

Transports to a family of hummingbird

Dad Hummingbird with Medium Beak: "YOOOO. You know how awesome it would be to have long beaks"
Mom Hummingbird with Short Beak: "Dude. It would be so easy to get the nectar in the flower"
Dad Hummingbird with Medium Beak: "Hear me out -- because we KNOW long beaks would be better. We should BEGIN TO HAVE a hummingbird baby with a long beak"
Mom Hummingbird with Short Beak: "OMG. We totally should. But could we do this? I seem to remember by 8th grade Science teacher saying we can't just choose our baby's traits"
Dad Hummingbird with Medium Beak: "Shoot. Stupid Biology. No wonder Began to have offspring with a mutation in its genes is a nope statement.

*End Scene*

TLDR:  A mutation has a chance to occur and IF it is an adaptive mutation, that offspring will pass on its genes to new generations. It happens by chance. You can't just decide to have a mutation in your offspring. The official NOPE statement is where two organisms begin to have offspring with a mutation in its genes for new trait

Do you need more help?

Go to this LINK here there are opportunities to study including:

A practice quiz

A video in which Mr. DeFreece shows you how to answer the Amplfy questions.

Other awesome stuff.

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Go to bit.ly/nsnmsgimkit and play the game
for the rest of the period!