• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
CHAPTER 9: THE THEORY OF EVOLUTION
CHAPTER 9: THE THEORY OF EVOLUTION

... subdivisions was the biblical author referring to? Various scholars – in order to claim biblical support for their own particular point of view (e.g., Young-earth creationism, theistic evolution) – have equated “kind” with species, genus, family, and even higher orders in the scientific classificati ...
dominant organisms
dominant organisms

... evolution states that all organisms on Earth have descended from a common ancestor. There is evidence that supports the theory of evolution by natural selection: 1. Variations do exist in populations 2. Fossils 3. Traits that allow organisms to thrive in particular environments. Since the time of Da ...
CHAPTER 23
CHAPTER 23

... • Cladogenesis - formation of 2 species from 1 ancestor species. • Occurs when populations occupy same area or when separated geographically from each other. • 1Allopatric speciation - populations separated by geographic barrier followed by reproductive isolation. ...
Role of Memory in the Evolution of Human Cognition
Role of Memory in the Evolution of Human Cognition

... encephalization, then why would a new innovation arise, such as the Acheulean hand ax, only to remain static over hundreds of thousands of years (4)? But if memory capacity was the primary trait being selected for during the two million years of evolution from Homo habilis to archaic modern humans, ...
Evolution – The Extended Synthesis. A research proposal
Evolution – The Extended Synthesis. A research proposal

... Altenberg,  Austria,  in  2008  under  the  same  title,   which  aimed  to  bring  together  leading  scientists   from   different   areas   of   evolutionary   biology   to   discuss   the   adequacy   of   our   current   theoretical   framework   of   evolutionary   theory.   In   five   sectio ...
Darwin, Victorian England, Eugenics, and a new evolution
Darwin, Victorian England, Eugenics, and a new evolution

... He adopts an ‘add-on’ model of general evolution. According to this concept, major evolutionary changes involve the addition of a new ‘layer’ of sequential physical relationship over the pre-existing ones, rather than the restructuring of previous modes of existence. It is for this reason that socal ...
Natural selection
Natural selection

... common with domesticated breeds of animals. Darwin noticed similarities between the selective breeding of domestic plants and animals and the different varieties of finches that he found. The selective breeding of domesticated plants and animals that Darwin observed is often referred to in science a ...
The big issue between science and religion: purpose vs. uncertainty
The big issue between science and religion: purpose vs. uncertainty

... positivism of the French philosophers August Comte and Marcel de Serres who saw life was a manifestation of progressive perfecting. Within that intellectual environment, virtually all French naturalists2 embraced some sort of “transformism” as evolution was known then. Paradigmatic of these points o ...
Decent With Modification Darwin’s Theory
Decent With Modification Darwin’s Theory

... all phenomena can be explained in a rational way, in terms of natural causes, without invoking the supernatural ...
Exam 3
Exam 3

... What is genetic diversity and why is it important? Know the difference between macroevolution and microevolution. What is a population? What are the five mechanisms of microevolutionary change? Be able to briefly describe each mechanism and be sure to state whether it is random or non-random with re ...
Evolution - OpenStax CNX
Evolution - OpenStax CNX

... are all characteristics that might be the same in you and your parents. If you have a dog or cat, and that dog or cat has ospring, you can often see aspects of the ospring (e.g. coat color, size) that are identical to those in the parental animal. One likely explanation for that observation is tha ...
Exam_2_Lecture_Notes
Exam_2_Lecture_Notes

... •Key contribution: Species evolve in response to environment •They do so by inheritance of acquired traits (e.g. Giraffe’s necks). There is no evidence for this. •Unfortunately, Lamarck is most remembered for being wrong. ...
19-Fossil Record (Mike Riddle CTI
19-Fossil Record (Mike Riddle CTI

... Lee Spetner (Ph.D. Physics – MIT, taught information and ...
What Evolution Is
What Evolution Is

... Lee Spetner (Ph.D. Physics – MIT, taught information and ...
Evolution of Living Systems
Evolution of Living Systems

... sense of origin of life forms elsewhere in the universe (astrobiology) • “As you sleep”, evolution is in action, and notable examples are GMO’s, pesticide resistance in plants and animals, and antibiotic resistance in microbes • Theory of evolution extraordinarily provides the mechanism to explain t ...
Biology Quiz 1 Review
Biology Quiz 1 Review

... • “Modern” science studies and theorizes only about things that can be observed and measured. • This naturalistic restriction necessarily rules out the existence of the supernatural because the supernatural cannot lie beyond the natural world. • It should be noted that by modern science’s strict de ...
What Evolution Is - Leisure Physical Therapy
What Evolution Is - Leisure Physical Therapy

... Lee Spetner (Ph.D. Physics – MIT, taught information and ...
Evolution and Diversity - McGraw Hill Higher Education
Evolution and Diversity - McGraw Hill Higher Education

... things since the beginning of life due to differential reproductive success. That is, some individuals reproduce more than others because they are better “fit” to their environment. Table 27.1 indicates that Earth is about 4.6 billion ...
Unit 8 EVOLUTION - Mayo High School for Math, Science
Unit 8 EVOLUTION - Mayo High School for Math, Science

... ensures reproductive success and adaptation to its environment. In addition to explain, assessments may require students to  summarize the ways that diversity affects a species chances of survival;  exemplify favorable traits that ensure reproductive success or species survival;  infer the fate o ...
The use of computer simulation in studying biological evolution
The use of computer simulation in studying biological evolution

... patterns of evolution • They can not prove that some process caused some evolutionary result, but they provide candidate causal explanations : « if pattern X is met, then process x is likely to have produced it” • And other causal processes may have been at work but they were not so significant rega ...
- Munich Personal RePEc Archive
- Munich Personal RePEc Archive

... Origin in high regard (cf S1). Furthermore, I concur that the Origin exceeds all other scientific ‘classics’ of past centuries in immediate and continued relevance to the basic theoretical formulation and debates of current practitioners. Careful exegesis of Darwin’s logic and intentions, through te ...
Study Guide - Issaquah Connect
Study Guide - Issaquah Connect

... Study Guide ...
The Evidence for Evolution
The Evidence for Evolution

... of constant evolutionary change through time. Some even saw in the record of horse evolution evidence for a progressive, guiding force, consistently pushing evolution to move in a single direction. We now know that such views are misguided; evolutionary change over millions of years is rarely so sim ...
ppt - Kyle Harms
ppt - Kyle Harms

... Alfred Russel Wallace (1823-1913) English biologist who also (independently) conceived of natural selection as the principal mechanism of adaptive evolution ...
Chapter 14
Chapter 14

... than most people of his time believed. This was an important idea for Darwin. For in order to explain evolution—to even rec¬ ognize that evolution had occurred—it was essential for Dar¬ win to realize that the Earth was very old. The long periods of time it would have taken for millions of species t ...
< 1 ... 35 36 37 38 39 40 41 42 43 ... 174 >

Punctuated equilibrium



Punctuated equilibrium (also called punctuated equilibria) is a theory in evolutionary biology which proposes that once species appear in the fossil record they will become stable, showing little net evolutionary change for most of their geological history. This state is called stasis. When significant evolutionary change occurs, the theory proposes that it is generally restricted to rare and geologically rapid events of branching speciation called cladogenesis. Cladogenesis is the process by which a species splits into two distinct species, rather than one species gradually transforming into another. Punctuated equilibrium is commonly contrasted against phyletic gradualism, the belief that evolution generally occurs uniformly and by the steady and gradual transformation of whole lineages (called anagenesis). In this view, evolution is seen as generally smooth and continuous.In 1972, paleontologists Niles Eldredge and Stephen Jay Gould published a landmark paper developing their theory and called it punctuated equilibria. Their paper built upon Ernst Mayr's model of geographic speciation, I. Michael Lerner's theories of developmental and genetic homeostasis, as well as their own empirical research. Eldredge and Gould proposed that the degree of gradualism commonly attributed to Charles Darwin is virtually nonexistent in the fossil record, and that stasis dominates the history of most fossil species.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report