SlideShare a Scribd company logo
1 of 25
Types of Natural Selection
Think. Pair. Share.


What are the driving
factors for the evolution
of a beetle from small and
brown to larger, red, and
spotted?
Types of Natural Selection
Types of Natural Selection
Types of Natural Selection
Types of Natural Selection
Types of Natural Selection
Types of Natural Selection
Types of Natural Selection


In some environments, a species may face one or
many selective pressures.
Types of Natural Selection

A selective pressure may increase or decrease the
survival and reproduction rate of certain traits.




        Weed killer is a selective pressure.
Types of Natural Selection




New population    Why do they not die?
Types of Natural Selection




         Evolution
Types of Natural Selection




Examples include climate, food availability, and
predators.
Types of Natural Selection


There are 4 types of Natural Selection:
1) Directional Selection
2) Stabilizing Selection
3) Disruptive Selection
4) Sexual Selection
Types of Natural Selection
Suppose a certain mouse population has a range
of fur colours, from light brown to dark brown.
Directional Selection

1) Directional selection occurs when a selective
pressure favours an extreme variation of a trait.
Directional Selection
For example, the surrounding woody environment may
provide better camouflage for darker mice, thus most
of the lighter colour mice may be easily hunted.
Stabilizing Selection

2) Stabilizing selection occurs when a selective
pressure favours the average phenotype.
Stabilizing Selection
For example, a new predator may only be able to see
vivid colours (like white and dark brown), allowing the
dull brown mouse to avoid detection and escape.
Disruptive Selection

3) Disruptive selection favours extreme traits for
survival while the average phenotype declines.
Disruptive Selection
For example, predators may not eat the vividly
coloured mice in the area because the other white and
dark brown creatures in the area are toxic.
Sexual Selection
4) Sexual selection favours traits that increase the
success for an organism to find a mate and reproduce.
Sexual Selection

Usually involves (female) mate choice or (male versus
male) competition.

Examples:
Peacock
Satyr tragopan (video)
Bighorn rams (video)
Sexual Selection
  Sexual Dimorphism is the difference of phenotypes
  between males and females of the same species.
  These are the traits often used in sexual selection.


Examples include:
- Colour
- Height
- Size of a particular feature
(such as horns or tusks)
Sexual Selection
The satyr tragopan displays its blue horns and wattle
to attract females.

More Related Content

Similar to 11u bio 09

CI440 Teaching Lesson Demo
CI440 Teaching Lesson DemoCI440 Teaching Lesson Demo
CI440 Teaching Lesson Demorevoj67
 
Natural selection
Natural selectionNatural selection
Natural selectionlegoscience
 
Mate Selection Theories
Mate Selection TheoriesMate Selection Theories
Mate Selection TheoriesLisa Kennedy
 
Mate Choice Versus Predation
Mate Choice Versus PredationMate Choice Versus Predation
Mate Choice Versus PredationKRENCHBOY
 
Modern concept of natural selection2
Modern concept of natural selection2Modern concept of natural selection2
Modern concept of natural selection2Aftab Badshah
 
Modern concept of natural selection
Modern concept of natural selectionModern concept of natural selection
Modern concept of natural selectionShehzad Max
 
Raeka Natural Selection
Raeka Natural SelectionRaeka Natural Selection
Raeka Natural SelectionKara Webber
 
392299825-Simulidae-Blackfly.pptx
392299825-Simulidae-Blackfly.pptx392299825-Simulidae-Blackfly.pptx
392299825-Simulidae-Blackfly.pptxKingslyNdanga2
 
Science 9 Unit A Biological Diversity Section1 Lesson1
Science 9 Unit A Biological Diversity Section1 Lesson1Science 9 Unit A Biological Diversity Section1 Lesson1
Science 9 Unit A Biological Diversity Section1 Lesson1Shorin
 
History and fundamentals of evolutionary theory
History and fundamentals of evolutionary theoryHistory and fundamentals of evolutionary theory
History and fundamentals of evolutionary theoryMadihaShah8
 
Animal adaptation and camouflage
Animal adaptation and camouflageAnimal adaptation and camouflage
Animal adaptation and camouflageBinu Mangalathettu
 
Modern concept of natural selection
Modern concept of natural selectionModern concept of natural selection
Modern concept of natural selectionAftab Badshah
 

Similar to 11u bio 09 (20)

natural_sel.pptx
natural_sel.pptxnatural_sel.pptx
natural_sel.pptx
 
CI440 Teaching Lesson Demo
CI440 Teaching Lesson DemoCI440 Teaching Lesson Demo
CI440 Teaching Lesson Demo
 
Natural selection
Natural selectionNatural selection
Natural selection
 
02b natural selection
02b natural selection02b natural selection
02b natural selection
 
Mate Selection Theories
Mate Selection TheoriesMate Selection Theories
Mate Selection Theories
 
02 classifying species
02 classifying species02 classifying species
02 classifying species
 
Mate Choice Versus Predation
Mate Choice Versus PredationMate Choice Versus Predation
Mate Choice Versus Predation
 
Modern concept of natural selection2
Modern concept of natural selection2Modern concept of natural selection2
Modern concept of natural selection2
 
Modern concept of natural selection
Modern concept of natural selectionModern concept of natural selection
Modern concept of natural selection
 
Raeka Natural Selection
Raeka Natural SelectionRaeka Natural Selection
Raeka Natural Selection
 
11 u natural selection
11 u natural selection11 u natural selection
11 u natural selection
 
Natural Selection.ppt
Natural Selection.pptNatural Selection.ppt
Natural Selection.ppt
 
392299825-Simulidae-Blackfly.pptx
392299825-Simulidae-Blackfly.pptx392299825-Simulidae-Blackfly.pptx
392299825-Simulidae-Blackfly.pptx
 
Science 9 Unit A Biological Diversity Section1 Lesson1
Science 9 Unit A Biological Diversity Section1 Lesson1Science 9 Unit A Biological Diversity Section1 Lesson1
Science 9 Unit A Biological Diversity Section1 Lesson1
 
History and fundamentals of evolutionary theory
History and fundamentals of evolutionary theoryHistory and fundamentals of evolutionary theory
History and fundamentals of evolutionary theory
 
03 taxonomy
03 taxonomy03 taxonomy
03 taxonomy
 
Animal adaptation and camouflage
Animal adaptation and camouflageAnimal adaptation and camouflage
Animal adaptation and camouflage
 
Evolution and natural_selection
Evolution and natural_selectionEvolution and natural_selection
Evolution and natural_selection
 
Ns and extiction2
Ns and extiction2Ns and extiction2
Ns and extiction2
 
Modern concept of natural selection
Modern concept of natural selectionModern concept of natural selection
Modern concept of natural selection
 

More from mrglosterscience (20)

Banana dna lab isolating dna from a banana activity
Banana dna lab   isolating dna from a banana activityBanana dna lab   isolating dna from a banana activity
Banana dna lab isolating dna from a banana activity
 
Organelles
OrganellesOrganelles
Organelles
 
Macro mols nucleic acids
Macro mols   nucleic acidsMacro mols   nucleic acids
Macro mols nucleic acids
 
11 u mutations
11 u mutations11 u mutations
11 u mutations
 
Intro to evolution
Intro to evolutionIntro to evolution
Intro to evolution
 
Enzymes
EnzymesEnzymes
Enzymes
 
Pedigrees lesson
Pedigrees lessonPedigrees lesson
Pedigrees lesson
 
05 mendelian genetics and humans
05 mendelian genetics and humans05 mendelian genetics and humans
05 mendelian genetics and humans
 
Protein structure
Protein structureProtein structure
Protein structure
 
Introduction to proteins
Introduction to proteinsIntroduction to proteins
Introduction to proteins
 
Bonding lesson
Bonding lessonBonding lesson
Bonding lesson
 
03 sex linked inheritance
03 sex linked inheritance03 sex linked inheritance
03 sex linked inheritance
 
Macro mols lipids lesson
Macro mols   lipids lessonMacro mols   lipids lesson
Macro mols lipids lesson
 
Isomers lesson
Isomers lessonIsomers lesson
Isomers lesson
 
04 blood types
04 blood types04 blood types
04 blood types
 
06 cell division
06 cell division06 cell division
06 cell division
 
Properties of water lesson
Properties of water lessonProperties of water lesson
Properties of water lesson
 
Macro mols - carbohydrates lesson
Macro mols - carbohydrates lessonMacro mols - carbohydrates lesson
Macro mols - carbohydrates lesson
 
02 codominance incomplete dominance
02 codominance incomplete dominance02 codominance incomplete dominance
02 codominance incomplete dominance
 
01 mendelian genetics
01 mendelian genetics01 mendelian genetics
01 mendelian genetics
 

Recently uploaded

How to Solve Singleton Error in the Odoo 17
How to Solve Singleton Error in the  Odoo 17How to Solve Singleton Error in the  Odoo 17
How to Solve Singleton Error in the Odoo 17Celine George
 
SOLIDE WASTE in Cameroon,,,,,,,,,,,,,,,,,,,,,,,,,,,.pptx
SOLIDE WASTE in Cameroon,,,,,,,,,,,,,,,,,,,,,,,,,,,.pptxSOLIDE WASTE in Cameroon,,,,,,,,,,,,,,,,,,,,,,,,,,,.pptx
SOLIDE WASTE in Cameroon,,,,,,,,,,,,,,,,,,,,,,,,,,,.pptxSyedNadeemGillANi
 
How to Add a New Field in Existing Kanban View in Odoo 17
How to Add a New Field in Existing Kanban View in Odoo 17How to Add a New Field in Existing Kanban View in Odoo 17
How to Add a New Field in Existing Kanban View in Odoo 17Celine George
 
How to Send Emails From Odoo 17 Using Code
How to Send Emails From Odoo 17 Using CodeHow to Send Emails From Odoo 17 Using Code
How to Send Emails From Odoo 17 Using CodeCeline George
 
5 charts on South Africa as a source country for international student recrui...
5 charts on South Africa as a source country for international student recrui...5 charts on South Africa as a source country for international student recrui...
5 charts on South Africa as a source country for international student recrui...CaraSkikne1
 
Department of Health Compounder Question ‍Solution 2022.pdf
Department of Health Compounder Question ‍Solution 2022.pdfDepartment of Health Compounder Question ‍Solution 2022.pdf
Department of Health Compounder Question ‍Solution 2022.pdfMohonDas
 
3.21.24 The Origins of Black Power.pptx
3.21.24  The Origins of Black Power.pptx3.21.24  The Origins of Black Power.pptx
3.21.24 The Origins of Black Power.pptxmary850239
 
Easter in the USA presentation by Chloe.
Easter in the USA presentation by Chloe.Easter in the USA presentation by Chloe.
Easter in the USA presentation by Chloe.EnglishCEIPdeSigeiro
 
EBUS5423 Data Analytics and Reporting Bl
EBUS5423 Data Analytics and Reporting BlEBUS5423 Data Analytics and Reporting Bl
EBUS5423 Data Analytics and Reporting BlDr. Bruce A. Johnson
 
Over the counter (OTC)- Sale, rational use.pptx
Over the counter (OTC)- Sale, rational use.pptxOver the counter (OTC)- Sale, rational use.pptx
Over the counter (OTC)- Sale, rational use.pptxraviapr7
 
How to Make a Field read-only in Odoo 17
How to Make a Field read-only in Odoo 17How to Make a Field read-only in Odoo 17
How to Make a Field read-only in Odoo 17Celine George
 
How to Add Existing Field in One2Many Tree View in Odoo 17
How to Add Existing Field in One2Many Tree View in Odoo 17How to Add Existing Field in One2Many Tree View in Odoo 17
How to Add Existing Field in One2Many Tree View in Odoo 17Celine George
 
Work Experience for psp3 portfolio sasha
Work Experience for psp3 portfolio sashaWork Experience for psp3 portfolio sasha
Work Experience for psp3 portfolio sashasashalaycock03
 
How to Show Error_Warning Messages in Odoo 17
How to Show Error_Warning Messages in Odoo 17How to Show Error_Warning Messages in Odoo 17
How to Show Error_Warning Messages in Odoo 17Celine George
 
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRADUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRATanmoy Mishra
 
What is the Future of QuickBooks DeskTop?
What is the Future of QuickBooks DeskTop?What is the Future of QuickBooks DeskTop?
What is the Future of QuickBooks DeskTop?TechSoup
 
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...Nguyen Thanh Tu Collection
 
KARNAADA.pptx made by - saransh dwivedi ( SD ) - SHALAKYA TANTRA - ENT - 4...
KARNAADA.pptx  made by -  saransh dwivedi ( SD ) -  SHALAKYA TANTRA - ENT - 4...KARNAADA.pptx  made by -  saransh dwivedi ( SD ) -  SHALAKYA TANTRA - ENT - 4...
KARNAADA.pptx made by - saransh dwivedi ( SD ) - SHALAKYA TANTRA - ENT - 4...M56BOOKSTORE PRODUCT/SERVICE
 
In - Vivo and In - Vitro Correlation.pptx
In - Vivo and In - Vitro Correlation.pptxIn - Vivo and In - Vitro Correlation.pptx
In - Vivo and In - Vitro Correlation.pptxAditiChauhan701637
 

Recently uploaded (20)

How to Solve Singleton Error in the Odoo 17
How to Solve Singleton Error in the  Odoo 17How to Solve Singleton Error in the  Odoo 17
How to Solve Singleton Error in the Odoo 17
 
Finals of Kant get Marx 2.0 : a general politics quiz
Finals of Kant get Marx 2.0 : a general politics quizFinals of Kant get Marx 2.0 : a general politics quiz
Finals of Kant get Marx 2.0 : a general politics quiz
 
SOLIDE WASTE in Cameroon,,,,,,,,,,,,,,,,,,,,,,,,,,,.pptx
SOLIDE WASTE in Cameroon,,,,,,,,,,,,,,,,,,,,,,,,,,,.pptxSOLIDE WASTE in Cameroon,,,,,,,,,,,,,,,,,,,,,,,,,,,.pptx
SOLIDE WASTE in Cameroon,,,,,,,,,,,,,,,,,,,,,,,,,,,.pptx
 
How to Add a New Field in Existing Kanban View in Odoo 17
How to Add a New Field in Existing Kanban View in Odoo 17How to Add a New Field in Existing Kanban View in Odoo 17
How to Add a New Field in Existing Kanban View in Odoo 17
 
How to Send Emails From Odoo 17 Using Code
How to Send Emails From Odoo 17 Using CodeHow to Send Emails From Odoo 17 Using Code
How to Send Emails From Odoo 17 Using Code
 
5 charts on South Africa as a source country for international student recrui...
5 charts on South Africa as a source country for international student recrui...5 charts on South Africa as a source country for international student recrui...
5 charts on South Africa as a source country for international student recrui...
 
Department of Health Compounder Question ‍Solution 2022.pdf
Department of Health Compounder Question ‍Solution 2022.pdfDepartment of Health Compounder Question ‍Solution 2022.pdf
Department of Health Compounder Question ‍Solution 2022.pdf
 
3.21.24 The Origins of Black Power.pptx
3.21.24  The Origins of Black Power.pptx3.21.24  The Origins of Black Power.pptx
3.21.24 The Origins of Black Power.pptx
 
Easter in the USA presentation by Chloe.
Easter in the USA presentation by Chloe.Easter in the USA presentation by Chloe.
Easter in the USA presentation by Chloe.
 
EBUS5423 Data Analytics and Reporting Bl
EBUS5423 Data Analytics and Reporting BlEBUS5423 Data Analytics and Reporting Bl
EBUS5423 Data Analytics and Reporting Bl
 
Over the counter (OTC)- Sale, rational use.pptx
Over the counter (OTC)- Sale, rational use.pptxOver the counter (OTC)- Sale, rational use.pptx
Over the counter (OTC)- Sale, rational use.pptx
 
How to Make a Field read-only in Odoo 17
How to Make a Field read-only in Odoo 17How to Make a Field read-only in Odoo 17
How to Make a Field read-only in Odoo 17
 
How to Add Existing Field in One2Many Tree View in Odoo 17
How to Add Existing Field in One2Many Tree View in Odoo 17How to Add Existing Field in One2Many Tree View in Odoo 17
How to Add Existing Field in One2Many Tree View in Odoo 17
 
Work Experience for psp3 portfolio sasha
Work Experience for psp3 portfolio sashaWork Experience for psp3 portfolio sasha
Work Experience for psp3 portfolio sasha
 
How to Show Error_Warning Messages in Odoo 17
How to Show Error_Warning Messages in Odoo 17How to Show Error_Warning Messages in Odoo 17
How to Show Error_Warning Messages in Odoo 17
 
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRADUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
 
What is the Future of QuickBooks DeskTop?
What is the Future of QuickBooks DeskTop?What is the Future of QuickBooks DeskTop?
What is the Future of QuickBooks DeskTop?
 
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...
 
KARNAADA.pptx made by - saransh dwivedi ( SD ) - SHALAKYA TANTRA - ENT - 4...
KARNAADA.pptx  made by -  saransh dwivedi ( SD ) -  SHALAKYA TANTRA - ENT - 4...KARNAADA.pptx  made by -  saransh dwivedi ( SD ) -  SHALAKYA TANTRA - ENT - 4...
KARNAADA.pptx made by - saransh dwivedi ( SD ) - SHALAKYA TANTRA - ENT - 4...
 
In - Vivo and In - Vitro Correlation.pptx
In - Vivo and In - Vitro Correlation.pptxIn - Vivo and In - Vitro Correlation.pptx
In - Vivo and In - Vitro Correlation.pptx
 

11u bio 09

Editor's Notes

  1. http://www.youtube.com/watch?v=zj8istSAMoYhttp://www.youtube.com/watch?v=7l79rgG9bDk