267 Anthro PPTs View free & download

INTRODUCTION TO ANTHRO PowerPoint PPT Presentation

INTRODUCTION TO ANTHRO - What do you know right now? ... Why do you think anthropologists are interested in finding out about the origin and ... Document presentation format: On-screen Show ...

What do you know right now? ... Why do you think anthropologists are interested in finding out about the origin and ... Document presentation format: On-screen Show ...

| PowerPoint PPT presentation | free to view

Anthro 2: Week 4: outline September 16 18, 2003 PowerPoint PPT Presentation

Anthro 2: Week 4: outline September 16 18, 2003 - Computers and Digital Devices to record enormous amounts of data ... Digital photography and videography. Tringham Anthro 2 Fall 03 Info Guide #4 ...

Computers and Digital Devices to record enormous amounts of data ... Digital photography and videography. Tringham Anthro 2 Fall 03 Info Guide #4 ...

| PowerPoint PPT presentation | free to view

ANTHRO 174 W Dr. Douglas White 7 Nov. 2006 PowerPoint PPT Presentation

ANTHRO 174 W Dr. Douglas White 7 Nov. 2006 - Step 3: Make Visual Representations of Data. Step 4: Do plenty of research, using reliable ... Specific: a higher consumption of fish as a local food supply in ...

Step 3: Make Visual Representations of Data. Step 4: Do plenty of research, using reliable ... Specific: a higher consumption of fish as a local food supply in ...

| PowerPoint PPT presentation | free to view

Chapter 15: Darwin PowerPoint PPT Presentation

Chapter 15: Darwin - Chapter 15: Darwin s Theory of Evolution Source: donsmaps.com Source: http://anthro.palomar.edu/evolve/evolve_2.htm

Chapter 15: Darwin s Theory of Evolution Source: donsmaps.com Source: http://anthro.palomar.edu/evolve/evolve_2.htm

| PowerPoint PPT presentation | free to download

ERGONOMICS - ERGONOMICS ANTHROPOMETRY Anthro pom etry. This is the branch of ergonomics that deals with body shape, size, weight, strength, proportions, and working capacity of ...

ERGONOMICS ANTHROPOMETRY Anthro pom etry. This is the branch of ergonomics that deals with body shape, size, weight, strength, proportions, and working capacity of ...

| PowerPoint PPT presentation | free to download

Human Activity PowerPoint PPT Presentation

Human Activity - Anthro = Human The main cause of climate change is the increased amounts of greenhouse gases in the ... (coal, oil, gas) Cement making Deforestation Methane ...

Anthro = Human The main cause of climate change is the increased amounts of greenhouse gases in the ... (coal, oil, gas) Cement making Deforestation Methane ...

| PowerPoint PPT presentation | free to view

Food Foraging (Life Before Heavy Beef)? PowerPoint PPT Presentation

Food Foraging (Life Before Heavy Beef)? - Hunters and Gatherers Food Foraging (Life Before Heavy Beef) To supplement your text, visit : anthro.palomar.edu/subsistence/Default.htm and click on Foraging

Hunters and Gatherers Food Foraging (Life Before Heavy Beef) To supplement your text, visit : anthro.palomar.edu/subsistence/Default.htm and click on Foraging

| PowerPoint PPT presentation | free to download

Philosophical Toolbox PowerPoint PPT Presentation

Philosophical Toolbox - Sciences. Biology. Conservation. Anthro 'Disciplinary Valleys' ... New methods. New area of knowledge. More unstable (at least at first) Tends to be team-driven ...

Sciences. Biology. Conservation. Anthro 'Disciplinary Valleys' ... New methods. New area of knowledge. More unstable (at least at first) Tends to be team-driven ...

| PowerPoint PPT presentation | free to download

The RSL-Hooke: A New Science Library for Oxford PowerPoint PPT Presentation

The RSL-Hooke: A New Science Library for Oxford - Geography reclassification (beyond ... 2km of RSL stack moved to deep store (independently funded) ... Kay McLeary Anthropology (kay.mcleary@anthro.ox.ac.uk) ...

Geography reclassification (beyond ... 2km of RSL stack moved to deep store (independently funded) ... Kay McLeary Anthropology (kay.mcleary@anthro.ox.ac.uk) ...

| PowerPoint PPT presentation | free to view

SOCIALIZATION PowerPoint PPT Presentation

SOCIALIZATION - SOCIALIZATION Prof. Fernando R. Pedrosa, Ph.D. Professor-in-charge, Socio-Anthro. - Looking-glass-self * We mentally assume the stance of other people and look at ...

SOCIALIZATION Prof. Fernando R. Pedrosa, Ph.D. Professor-in-charge, Socio-Anthro. - Looking-glass-self * We mentally assume the stance of other people and look at ...

| PowerPoint PPT presentation | free to download

Biomes - Poison ivy. Purple cone flower. Purple cone flower. Poison ivy. Silver tree maple. http://anthro.palomar.edu/animal/images/elephant.jpg ...

Poison ivy. Purple cone flower. Purple cone flower. Poison ivy. Silver tree maple. http://anthro.palomar.edu/animal/images/elephant.jpg ...

| PowerPoint PPT presentation | free to view

Asserting SelfDetermination in an Age of Biocolonialism PowerPoint PPT Presentation

Asserting SelfDetermination in an Age of Biocolonialism - 500 federally recognized Tribes & Alaska Native Villages (government-to ... Floyd Red Crow Westerman, Here Come the Anthros. Commercializing Human Genes ...

500 federally recognized Tribes & Alaska Native Villages (government-to ... Floyd Red Crow Westerman, Here Come the Anthros. Commercializing Human Genes ...

| PowerPoint PPT presentation | free to view

Nature Genetics, Supplement, November 2004 PowerPoint PPT Presentation

Nature Genetics, Supplement, November 2004 - Nature Genetics, Supplement, November 2004. http://anthro.palomar.edu ... Tishkoff & Kidd (2004). Nature Genetics Supplement, 36, S21-S27. Out of Africa Theory: ...

Nature Genetics, Supplement, November 2004. http://anthro.palomar.edu ... Tishkoff & Kidd (2004). Nature Genetics Supplement, 36, S21-S27. Out of Africa Theory: ...

| PowerPoint PPT presentation | free to download

Lesson Two - ology. Study of. altercation. A heated argument. anthro. man. apathy. Lack of interest. ambivalent. Being uncertain; unable to decide between two opposing points ...

ology. Study of. altercation. A heated argument. anthro. man. apathy. Lack of interest. ambivalent. Being uncertain; unable to decide between two opposing points ...

| PowerPoint PPT presentation | free to view

La Ropa Maya PowerPoint PPT Presentation

La Ropa Maya - La Ropa Maya. El huipil. El corte. La faja. El quechquemitl. La cinta. El rebozo. Los calzoncillos ... www.anthro.fsu.edu. www.nimpot.com. www.rutahasa.com. www. ...

La Ropa Maya. El huipil. El corte. La faja. El quechquemitl. La cinta. El rebozo. Los calzoncillos ... www.anthro.fsu.edu. www.nimpot.com. www.rutahasa.com. www. ...

| PowerPoint PPT presentation | free to view

Vocabulary Builders PowerPoint PPT Presentation

Vocabulary Builders - The anthro pology professor commented ... The young wrestler was stronger than his antagonist. ... After the snake bit him, he was quickly given an antidote. ...

The anthro pology professor commented ... The young wrestler was stronger than his antagonist. ... After the snake bit him, he was quickly given an antidote. ...

| PowerPoint PPT presentation | free to view

Welcome to The Arizona General Education Curriculum AGEC Power Point Presentation. We will present: PowerPoint PPT Presentation

Welcome to The Arizona General Education Curriculum AGEC Power Point Presentation. We will present: - PSY 227 Personality Theory (3) PSY 236 Psychology of Women (3) PSY 240 Devel Psychology (3) ... ANT 102 Intro to cult Anthro (3) ANT 210 Peoples of theWorld (3) ...

PSY 227 Personality Theory (3) PSY 236 Psychology of Women (3) PSY 240 Devel Psychology (3) ... ANT 102 Intro to cult Anthro (3) ANT 210 Peoples of theWorld (3) ...

| PowerPoint PPT presentation | free to view

s - 456789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz GpSs tFTO ... ( P*F ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ) ( ( ( ( ( ( ( ...

456789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz GpSs tFTO ... ( P*F ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ) ( ( ( ( ( ( ( ...

| PowerPoint PPT presentation | free to view

The TransAtlantic Slave Trade PowerPoint PPT Presentation

The TransAtlantic Slave Trade - The Trans-Atlantic Slave Trade. http://www.cnn.com/2000/fyi/news/09/13/african. ... http://www.si.umich.edu/CHICO/Schomburg/text/migration7big.html. 1450-1870 ...

The Trans-Atlantic Slave Trade. http://www.cnn.com/2000/fyi/news/09/13/african. ... http://www.si.umich.edu/CHICO/Schomburg/text/migration7big.html. 1450-1870 ...

| PowerPoint PPT presentation | free to view

Genetics Review PowerPoint PPT Presentation

Genetics Review - Genetics Review Genetic Material The nucleus of a cell contains genetic material DNA Chromosomes Genes Genes Genes are short sections of chromosomes Genes come in ...

Genetics Review Genetic Material The nucleus of a cell contains genetic material DNA Chromosomes Genes Genes Genes are short sections of chromosomes Genes come in ...

| PowerPoint PPT presentation | free to download

Informal Meeting on Anthropology and Development in the Bloomsbury Colleges PowerPoint PPT Presentation

Informal Meeting on Anthropology and Development in the Bloomsbury Colleges - Can help organize workshops, project proposals, etc. at no cost to staff ... [Paul Boyce (Thomas Coram Res Unit) Ethnography of same-sex sexualities and ...

Can help organize workshops, project proposals, etc. at no cost to staff ... [Paul Boyce (Thomas Coram Res Unit) Ethnography of same-sex sexualities and ...

| PowerPoint PPT presentation | free to view

Ethnicity - Ethnicity * * * * * * * * * * * * * * * * * * * * * * * * Ethnicity: Identity with a group of people that share distinct physical and mental traits as a product of ...

Ethnicity * * * * * * * * * * * * * * * * * * * * * * * * Ethnicity: Identity with a group of people that share distinct physical and mental traits as a product of ...

| PowerPoint PPT presentation | free to download

TOPIC IX TROPOSPHERIC AEROSOLS, ACID RAIN, PowerPoint PPT Presentation

TOPIC IX TROPOSPHERIC AEROSOLS, ACID RAIN, - ACID RAIN. In addition, acid generation can occur by reactions involving dissolved O3, H2O2, ... MEASUREMENTS IN RAIN. Aerosols are solid or liquid particles ...

ACID RAIN. In addition, acid generation can occur by reactions involving dissolved O3, H2O2, ... MEASUREMENTS IN RAIN. Aerosols are solid or liquid particles ...

| PowerPoint PPT presentation | free to view

PHYSICAL CHARACTERISTICS OF THE TAINOS PowerPoint PPT Presentation

PHYSICAL CHARACTERISTICS OF THE TAINOS - GRADE: 10 TEACHER: MR. C. BROWN TAINOS Ta no Indians, are a subgroup of the Arawakan Indians (a group of American Indians in northeastern South ...

GRADE: 10 TEACHER: MR. C. BROWN TAINOS Ta no Indians, are a subgroup of the Arawakan Indians (a group of American Indians in northeastern South ...

| PowerPoint PPT presentation | free to download

OFFCLASSROOM LEARNING ACTIVITIES FOR SOCIAL SCIENCE CLASSES PowerPoint PPT Presentation

OFFCLASSROOM LEARNING ACTIVITIES FOR SOCIAL SCIENCE CLASSES - Off-classroom learning activities directly expose students to social, ... Corregidor. Intramuros. Mt. Banahaw. National Museum. Pamitinan Cave. Vigan, Ilocos Sur ...

Off-classroom learning activities directly expose students to social, ... Corregidor. Intramuros. Mt. Banahaw. National Museum. Pamitinan Cave. Vigan, Ilocos Sur ...

| PowerPoint PPT presentation | free to view

Origins of Humanity PowerPoint PPT Presentation

Origins of Humanity - Arm-hanging anatomy persists long after the onset of ... Large muscle attachment areas. Paranthropus robustus. DNH 7, 'Eurydice', Paranthropus robustus. ...

Arm-hanging anatomy persists long after the onset of ... Large muscle attachment areas. Paranthropus robustus. DNH 7, 'Eurydice', Paranthropus robustus. ...

| PowerPoint PPT presentation | free to view

Jeopardy - Title: Jeopardy Author: SCPS Last modified by: pete Created Date: 9/17/1998 2:16:32 PM Document presentation format: On-screen Show (4:3) Company: Seminole Coutny ...

Title: Jeopardy Author: SCPS Last modified by: pete Created Date: 9/17/1998 2:16:32 PM Document presentation format: On-screen Show (4:3) Company: Seminole Coutny ...

| PowerPoint PPT presentation | free to view

Museum Entrance PowerPoint PPT Presentation

Museum Entrance - Welcome to the Bonilla Museum Museum Entrance Press for Curator People of Trade Room Fur Trade Room Native American Economics Every Day Living Native American ...

Welcome to the Bonilla Museum Museum Entrance Press for Curator People of Trade Room Fur Trade Room Native American Economics Every Day Living Native American ...

| PowerPoint PPT presentation | free to download

Constraining the time when language evolved PowerPoint PPT Presentation

Constraining the time when language evolved - Title: The individual and the species in the cultural evolution of language Author: Lsj Last modified by: Lsj Created Date: 5/23/2004 8:26:05 AM Document presentation ...

Title: The individual and the species in the cultural evolution of language Author: Lsj Last modified by: Lsj Created Date: 5/23/2004 8:26:05 AM Document presentation ...

| PowerPoint PPT presentation | free to download

Introduction to Archaeology PowerPoint PPT Presentation

Introduction to Archaeology - Describe the methods archaeologists use to achieve these goals ... Indiana Jones. First Lab. Archaeology and the Media. Archaeologists commonly misrepresented ...

Describe the methods archaeologists use to achieve these goals ... Indiana Jones. First Lab. Archaeology and the Media. Archaeologists commonly misrepresented ...

| PowerPoint PPT presentation | free to view

Asserting Self-Determination in an Age of Biocolonialism - Asserting Self-Determination in an Age of Biocolonialism Debra Harry, Ph.D. (ABD) dharry@ipcb.org Executive Director Indigenous Peoples Council on Biocolonialism

Asserting Self-Determination in an Age of Biocolonialism Debra Harry, Ph.D. (ABD) dharry@ipcb.org Executive Director Indigenous Peoples Council on Biocolonialism

| PowerPoint PPT presentation | free to view

Hominid Evolution Part 2 - Hominid Evolution Part 2

Hominid Evolution Part 2

| PowerPoint PPT presentation | free to view

Nature of Humanity PowerPoint PPT Presentation

Nature of Humanity - Nature of Humanity. A Personal View. Mt-DNA Primate Tree. Our Living Sisters. Pan. Gorilla ... The Smithsonian Institution Museum of Natural History ...

Nature of Humanity. A Personal View. Mt-DNA Primate Tree. Our Living Sisters. Pan. Gorilla ... The Smithsonian Institution Museum of Natural History ...

| PowerPoint PPT presentation | free to view

Multiple Alleles PowerPoint PPT Presentation

Multiple Alleles - Multiple Alleles Genetics Unit Biology 30 Mrs. S. Pipke-Painchaud Multiple Alleles have 3 or more alleles for the same gene (or at a single locus) In Other Words ...

Multiple Alleles Genetics Unit Biology 30 Mrs. S. Pipke-Painchaud Multiple Alleles have 3 or more alleles for the same gene (or at a single locus) In Other Words ...

| PowerPoint PPT presentation | free to view

Nature Genetics, Supplement, November 2004 - Nature Genetics Supplement, 36, S21-S27. Tishkoff & Kidd (2004) ... continental population. Implications: asteroid. HGSS: Carey: Figure 14.1 ...

Nature Genetics Supplement, 36, S21-S27. Tishkoff & Kidd (2004) ... continental population. Implications: asteroid. HGSS: Carey: Figure 14.1 ...

| PowerPoint PPT presentation | free to download

ASIP PM2.5 SIP Analyses PowerPoint PPT Presentation

ASIP PM2.5 SIP Analyses - Emissions sensitivities define where to look for additional ... Hickory, NC. Greenville, SC. Chattanooga, TN. KY and WV FRM Samplers. Annual Arithmetic Mean ...

Emissions sensitivities define where to look for additional ... Hickory, NC. Greenville, SC. Chattanooga, TN. KY and WV FRM Samplers. Annual Arithmetic Mean ...

| PowerPoint PPT presentation | free to view

Formaldehyde columns from GOME as a proxy for biogenic emissions over Europe PowerPoint PPT Presentation

Formaldehyde columns from GOME as a proxy for biogenic emissions over Europe - Exploit the fast oxidation of isoprene to mark source regions looking at its ... Estimate isoprene emissions country by country for comparison with Simpson et al. ...

Exploit the fast oxidation of isoprene to mark source regions looking at its ... Estimate isoprene emissions country by country for comparison with Simpson et al. ...

| PowerPoint PPT presentation | free to download

The best creative designs only for your convenient PowerPoint PPT Presentation

The best creative designs only for your convenient - Enhance your website through our services and make the best use of it a price that worth the beneficiaries.

Enhance your website through our services and make the best use of it a price that worth the beneficiaries.

| PowerPoint PPT presentation | free to download

Laura T. Gonzalez PowerPoint PPT Presentation

Laura T. Gonzalez - Green Update: Environmental Stewardship Taskforce LAURA T. GONZALEZ ACADEMIC SENATE MEETING 10.04.11 Manzanita Project Vernal Pool Site Curriculum The Manzanita ...

Green Update: Environmental Stewardship Taskforce LAURA T. GONZALEZ ACADEMIC SENATE MEETING 10.04.11 Manzanita Project Vernal Pool Site Curriculum The Manzanita ...

| PowerPoint PPT presentation | free to download

Hominid Evolution PowerPoint PPT Presentation

Hominid Evolution - Probably developed between 8 and 4 million years ago in Africa, but we are still ... Saggital crest and temporo-nuchal crest across lower back of skull 'Apelike' face ...

Probably developed between 8 and 4 million years ago in Africa, but we are still ... Saggital crest and temporo-nuchal crest across lower back of skull 'Apelike' face ...

| PowerPoint PPT presentation | free to view

BEADWORK - BEADWORK Beadwork The Indigenous peoples of the Americas made beadwork for centuries prior to the arrival of Europeans in North America. The First Beads Seeds ...

BEADWORK Beadwork The Indigenous peoples of the Americas made beadwork for centuries prior to the arrival of Europeans in North America. The First Beads Seeds ...

| PowerPoint PPT presentation | free to download

Looking%20at%20Human%20Evolution PowerPoint PPT Presentation

Looking%20at%20Human%20Evolution - Looking at Human Evolution

Looking at Human Evolution

| PowerPoint PPT presentation | free to download

Analyzing Health Equity Using Household Survey Data PowerPoint PPT Presentation

Analyzing Health Equity Using Household Survey Data - Analyzing Health Equity Using Household Survey Data Lecture 4 Health Outcome #2: Anthropometrics

Analyzing Health Equity Using Household Survey Data Lecture 4 Health Outcome #2: Anthropometrics

| PowerPoint PPT presentation | free to download

SELAMAT DATANG PowerPoint PPT Presentation

SELAMAT DATANG - OM SWASTYASTU Staf Manajemen Sekolah Drs I Nyoman Muditha, M.Pd = Kepsek SMAN 6 Denpasar Drs Jrokum = Waka Kurikulum I Drs Nengah Mudana = Waka ...

OM SWASTYASTU Staf Manajemen Sekolah Drs I Nyoman Muditha, M.Pd = Kepsek SMAN 6 Denpasar Drs Jrokum = Waka Kurikulum I Drs Nengah Mudana = Waka ...

| PowerPoint PPT presentation | free to view

Cultural Survival PowerPoint PPT Presentation

Cultural Survival - It is noted that even well-intentioned interference (such as the ... of rightness, in contradistinction to modernism, which was based in the assumed ...

It is noted that even well-intentioned interference (such as the ... of rightness, in contradistinction to modernism, which was based in the assumed ...

| PowerPoint PPT presentation | free to view

Pilier sciences humaines et sociales (SHS) PowerPoint PPT Presentation

Pilier sciences humaines et sociales (SHS) - Parce qu'il est n cessaire de clarifier l'apport sp cifique de chaque discipline ... et formation des adultes. Recherche fondamentale et appliqu e. ...

Parce qu'il est n cessaire de clarifier l'apport sp cifique de chaque discipline ... et formation des adultes. Recherche fondamentale et appliqu e. ...

| PowerPoint PPT presentation | free to download

C-ID Update - Can establishing appropriate program consistency in awards ... Art History, Spanish lack of CSU reviewers or lack of active reviewers Music recovering ...

Can establishing appropriate program consistency in awards ... Art History, Spanish lack of CSU reviewers or lack of active reviewers Music recovering ...

| PowerPoint PPT presentation | free to download

Constraining the time when language evolved - University of J nk ping, Sweden. Precise time of language ... Beads (ostrich eggs), 52,000 BP. McBrearty & Brooks (2000) Used pigment chunk, 200,000 years BP ...

University of J nk ping, Sweden. Precise time of language ... Beads (ostrich eggs), 52,000 BP. McBrearty & Brooks (2000) Used pigment chunk, 200,000 years BP ...

| PowerPoint PPT presentation | free to view

Earths Plates PowerPoint PPT Presentation

Earths Plates - Mariana Trench: Pacific plate subducts under Mariana plate ... www.extremescience.com/graphics/Deform.gif. Convergent Boundary: ...

Mariana Trench: Pacific plate subducts under Mariana plate ... www.extremescience.com/graphics/Deform.gif. Convergent Boundary: ...

| PowerPoint PPT presentation | free to view

Kim M. Cobb - The science of global warming Kim M. Cobb kcobb@eas.gatech.edu Sustainable Atlanta Roundtable September 8, 2006 The Hockey Stick The Hockey Stick versus ...

The science of global warming Kim M. Cobb kcobb@eas.gatech.edu Sustainable Atlanta Roundtable September 8, 2006 The Hockey Stick The Hockey Stick versus ...

| PowerPoint PPT presentation | free to download

Plains Indians: The Kiowas and the Mandans PowerPoint PPT Presentation

Plains Indians: The Kiowas and the Mandans - Up to sixty families could live in one lodge. ... They also used buffalo fur, beads, buffalo fat, and feathers to decorate their clothing. ...

Up to sixty families could live in one lodge. ... They also used buffalo fur, beads, buffalo fat, and feathers to decorate their clothing. ...

| PowerPoint PPT presentation | free to download

Biodiversity on planet earth PowerPoint PPT Presentation

Biodiversity on planet earth - 'Biodiversity is the variety of life on Earth, from the simplest ... Sympatric speciation. Hudson River Valley...flies bred on Hawthorne fruits, mid 1800's ...

'Biodiversity is the variety of life on Earth, from the simplest ... Sympatric speciation. Hudson River Valley...flies bred on Hawthorne fruits, mid 1800's ...

| PowerPoint PPT presentation | free to view

The relationship between radical constructivism, social constructivism and sociocultural theory PowerPoint PPT Presentation

The relationship between radical constructivism, social constructivism and sociocultural theory - radical constructivism, social constructivism and sociocultural theory. Christian Holmboe ... Constructivism. Knowledge is organised in cognitive schemes ...

radical constructivism, social constructivism and sociocultural theory. Christian Holmboe ... Constructivism. Knowledge is organised in cognitive schemes ...

| PowerPoint PPT presentation | free to view

The Mesozoic Era PowerPoint PPT Presentation

The Mesozoic Era - Plants: The first flowering plants began in the Cretaceous ... The Cretaceous Period ended with a mass extinction about 65 million years ago, ...

Plants: The first flowering plants began in the Cretaceous ... The Cretaceous Period ended with a mass extinction about 65 million years ago, ...

| PowerPoint PPT presentation | free to download

Class Slides Set 21 - Class Slides Set 21

Class Slides Set 21

| PowerPoint PPT presentation | free to download

Chapter 15: Ethnographic Research PowerPoint PPT Presentation

Chapter 15: Ethnographic Research - Applied anthropology means using anthropological research and knowledge to help ... the extended, on-location research to gather detailed and in-depth information ...

Applied anthropology means using anthropological research and knowledge to help ... the extended, on-location research to gather detailed and in-depth information ...

| PowerPoint PPT presentation | free to view

Anthro PowerPoint PPT Presentations