• 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
1/18 - Faculty Virginia
1/18 - Faculty Virginia

... modification, on five ideas that are each now regarded as theories (well-supported ideas with broad explanatory power) 1.Perpetual Change. Life is very old and life forms undergo perpetual intergenerational change in form and diversity 2.Common Descent. All life forms share a common ancestry. 3.Mult ...
BCPS Biology Reteaching Guide Evolution Vocab Chart
BCPS Biology Reteaching Guide Evolution Vocab Chart

... Process by which individuals better suited to their environment survive and reproduce most successfully; also called survival of the fittest ...
Review Packet - Unit 15 Populations and Natural Selection Short
Review Packet - Unit 15 Populations and Natural Selection Short

... Independent – Doesn’t matter how many individuals there are – rare events that affect all populations equally 3. Explain how evolutionary pressure from natural selection regulates population growth. Only the strong survive when limiting factors begin to put pressure on a population – individuals unf ...
File
File

... 10. Evolution leads to the eventual formation of a perfect organism. True or False 11. In Science, evolution is referred to as? A. More speculation B. An explanation of why species become extinct C. Change over time D. An explanation for the rate of population growth 12. Individuals that are better ...
Unit 6
Unit 6

... mutations, Random mating, and Natural selection. 4. It describes the genetic structure of non-evolving populations. 5. Microevolution is caused by these examples because they affect the allele frequencies in the population. They also introduce a change in the alleles or genotypes. 6. A bottleneck oc ...
Unit 7 History and Organization of Biological Diversity
Unit 7 History and Organization of Biological Diversity

... Summarize!the!sequence!of!hypothesized!events!that!lead!from!a!lifeless! Earth!to!the!presence!of!a!eukaryotic!cell.! ...
Evolution - treshamurphy
Evolution - treshamurphy

... • Speciation- if enviro. changes over time, or org. are separated in some way, changes may proceed in diff. directions for diff. groups; over time, the groups change so much, they can no longer interbreed, and they become separate species ...
Evolution: Did it begin with Origin of the Species?
Evolution: Did it begin with Origin of the Species?

... • James Hutton (1726-1797) proposed a theory that contrasted with Cuvier’s • Gradualism • Geological formations are the product of slow but continuous processes • Influential in the understanding of evolution ...
O - Moein Ferdosian
O - Moein Ferdosian

... Ex. Timber wolf and Tasmanian wolf Sleek, hunters, etc… ...
Chapter 22 Notes
Chapter 22 Notes

... gradualism into a theory called Uniformitarianism. ...
evolution - Osborne High School
evolution - Osborne High School

... This shows that the population evolved from light being more common before Industrial revolution to dark after. This type of natural selection is called Directional selection ...
honors BIOLOGY 
honors BIOLOGY 

... Teacher Print Work: test,  “Evol.Change”,  “Comparing Primate Fossils: Skulls and Pelvis”,  “Biochem. Evidence”, Major Mechanisms of Evolutionary Change  Extra Credit: Hardy-Weinberg Problem Set for (Ch.13.9,10),  ”Episodic Nature”  “Our Greatest Step” CHAPTER 13: ...
File
File

... Darwin was struck by the variation in traits he observed on his travels. Variation is the difference in the physical traits of an individual from those of other individuals in the group to which it belong. Ex: Different breeds of dogs. Darwin noted that the species found on one island looked differe ...
I. Developing the Theory of Natural Selection
I. Developing the Theory of Natural Selection

... The fossil record 1. Give 2 reasons the fossil record is an important source of information? shows how species change; shows common ancestors 2. What did Darwin predict about fossils? show links between ancient & current 3. What is a ‘transitional fossil’? (missing) links show change 4. Give one exa ...
Prof. Eviatar Nevo, University of Haifa, Israel
Prof. Eviatar Nevo, University of Haifa, Israel

... Institute of Evolution, University of Haifa, Mount Carmel, Haifa 31905 Biodiversity evolution and the relative importance of forces driving evolution of genotypes and phenotypes require more critical testing and generalizations across phylogeny. In the long-term research project at the "Evolution Ca ...
Darwin on Trial - Society of Creation
Darwin on Trial - Society of Creation

... by the accumulation of small mutations, because the number of mutations would have to be so large and the time available was not nearly long enough for them to appear.” (38) Chapter 4: The Fossil Problem “… Darwin‟s most formidable opponents were not clergymen, but fossil experts.” (45) “Darwin ackn ...
www.LessonPlansInc.com
www.LessonPlansInc.com

... Summary: Students will fill out a worksheet with information on what they will be tested on. Goals & Objectives: Students will be able to explain natural selection, the evolution of populations, and example evidence. Time Length: 20 minutes Standards: CA Biology 7a, 7b, 7c 7d, 8a, 8b, 8c, 8d, 8e. Ma ...
The History of Life - Northside Middle School
The History of Life - Northside Middle School

... structures to look very similar • So, unrelated organisms come to resemble one another – Analogous structures = structures which look and function similarly, but do not share a common evolutionary history ...
Unit 5 Evolution
Unit 5 Evolution

...  These organisms pass their heritable traits ...
1. State the two major points Darwin made in The Origin of Species
1. State the two major points Darwin made in The Origin of Species

... an ideal, eternal, real world and an illusionary imperfect world that humans perceive with their senses Aristotle – beliefs also excluded evolution - recognized that organisms vary from simple to complex and believed that they could be placed on a scale of increasing ...
Aim #75: How does evolution occur by natural
Aim #75: How does evolution occur by natural

... 2)Unit 7d due Friday, April 22nd – Do not forget Castle Learning!! ...
Chapter 22
Chapter 22

... 13. Distinguish between artificial selection and natural selection. 14. Explain why an individual organism cannot evolve. 15. Describe the experiments that supported Reznick and Endler’s hypothesis that differences in life-history traits between guppy populations are due to selective pressure based ...
PPT 2 revised - Bibb County Schools
PPT 2 revised - Bibb County Schools

... Variations that increase reproductive success will have a greater chance of being passed on from generation to generation. A population will slowly change over time in response to the environment. ...
A. Darwinian - cloudfront.net
A. Darwinian - cloudfront.net

... foreheads bump into the pollen structure. Cardinal flowers are red which hummingbirds can see but bees can’t, and their pollen structure is at just the right height for the hummingbird to pick up pollen as it feeds. ...
File
File

... 12) BEHAVIORAL Isolation occurs when mating behaviors or mating seasons don’t allow for mating. 13) Provide an example to describe how either geographic isolation or behavioral isolation can lead to speciation. a. BEETLES (FROM NOTES) b. BIRDS MATING BEHAVIOR (SONGS/DANCES/ETC) 14) The idea that spe ...
< 1 ... 98 99 100 101 102 103 104 105 106 ... 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