• Study Resource
  • Explore Categories
    • 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
Darwin`s Idea of Common Descent
Darwin`s Idea of Common Descent

... • changes through the gradual change of population rather than the sudden production of new individuals • species arise: • Through gradual accumulation of adaptations to a different environment ...
Evolution
Evolution

... Macroevolution: Speciation ...
Evolution Study Guide
Evolution Study Guide

... 1. Recognize the 5 major sources of evidence for evolution.  a. Fossils, Geography, Embryology, Anatomy, Molecular (DNA)  2. Compare and contrast relative dating and radiometric dating.  a. Be able to read a graph (such as figure 12.4 in your book) to tell how old something is).  3. Be able to recog ...
Directed Readlnq
Directed Readlnq

... Section: Beyond Darwinian Theory Complete each statement by writing the correct term in the space provided. ...
2 new species
2 new species

... 7. How can lethal alleles be passed on through generations? • It can be hidden by the dominant alleles/traits in carriers ...
Evolution & Natural Selection
Evolution & Natural Selection

... created the ozone layer (ozone is O3) which blocks out deadly ultraviolet radiation from the sun. until the formation of the ozone layer, all life had to remain in the water. ...
Changes Over Time
Changes Over Time

... investigate and understand how populations change through time. Key concepts include: • a) evidence found in fossil records; • b) how genetic variation, reproductive strategies, and environmental pressures impact the survival of populations; • c) how natural selection leads to adaptations; • d) emer ...
Darwin_Ecology_and_Evolution
Darwin_Ecology_and_Evolution

... to describe evolutionary relationship • Understanding The Population Concept: – populations and species evolve, individuals do not ...
File
File

... members of a species that are best suited to their environment survive and reproduce at a higher rate than other members of species  “Survival of the fittest.” ...
Evidence for Evolution
Evidence for Evolution

... their success in this struggle for existence. 3. Parents possessing certain traits that enable them to survive and reproduce will contribute disproportionately to the offspring that make up the next generation. 4. The population in the next generation will consist of a higher proportion of individua ...
Name Period
Name Period

... relationships. For example, the fact that human embryos and those of all four-limbed vertebrates have pharyngeal gill slits for a short period during development is evidence of a shared ancestor. Biogeography – The drifting of the continents caused species to be geographically isolated and lead to c ...
Evolution Review - LFHS AP Biology
Evolution Review - LFHS AP Biology

... 4. There are 28 morphologically diverse species of a group of sunflowers called silverswords found on the Hawaiian Archipelago. These species are an example of a. a geographical cline. b. adaptive radiation. c. allopolyploidy. d. the bottleneck effect. a. sympatric speciation. 5. Which of the follow ...
Lecture #10 Date
Lecture #10 Date

... Darwin’s finches • Darwin’s conclusions – small populations of original South American ...
AP Biology Chapter 22 Descent with Modification: A Darwinian View
AP Biology Chapter 22 Descent with Modification: A Darwinian View

... Hutton – proposed Earth’s geologic features could be explained by gradual mechanisms still operating (gradual geologic change) Lyell- proposed the same geologic processes are operating today as in the past (modern geology) ...
Evidence supporting evolution
Evidence supporting evolution

... Bell Work Question  Name causes of genetic drift and ...
Evolution PowerPoint
Evolution PowerPoint

... Evolution by natural selection happens in populations, not individuals. A single organism cannot evolve. Populations evolve. ...
BIOLOGY
BIOLOGY

... A. Natural variation exists in a population B. Organisms must compete with each other to survive. C. Organisms with the highest fitness will survive and reproduce and others will die out. D. Traits an organism acquires through use during its lifetime can be passed on to offspring. E. Species alive t ...
Chapter 22: Descent with Modification: A Darwinian
Chapter 22: Descent with Modification: A Darwinian

... individuals to survive and reproduce will lead to the accumulation of favorable traits in the population over generations. 13. What can differential reproductive success lead to over time? Over time, this process will increase the frequency of individuals with favorable adaptations and hence refine ...
Topic 5: Ecology and Evolution - HIS IB Biology 2011-2013
Topic 5: Ecology and Evolution - HIS IB Biology 2011-2013

... chromosomes metaphase 1 ...
The Origin and Evolution of Life
The Origin and Evolution of Life

... • Little used structures dissappear ...
Evolution Study Guide
Evolution Study Guide

... Use the diagram below to answer the following two questions. Locality I and II are two different locations. Numbers 1-4 and a-d are rock layers in the locations. ...
Evolutionary Theory 3
Evolutionary Theory 3

... species fails to produce any more descendants. • Extinction, like speciation, can only be detected after it is complete. • The species that exist at any time are the result of Tasmanian Wolf— both speciation and driven to extinction in Australia in the early extinction 1900s by ranchers and dogs. ...
1 - AP Biology Overview
1 - AP Biology Overview

... 1. What was the contribution made by Linnaeus to the development of the theory of evolution? 2. Explain the errors in Lamarck's theory of evolution. 3. What aspect of the flora and fauna of the Galapagos did Darwin find puzzling? 4. How did the Galapagos finches form the foundation for Darwin's thin ...
CHANGES THROUGHOUT TIME
CHANGES THROUGHOUT TIME

... EVOLUTION  Remember, an organism’s ability to survive and reproduce makes it successful, which happens only if it can adapt to its’ environment, eventually leading to an overall change (evolution) in the species over time.  In other words, if it doesn’t change ...
Evolution Jeopardy
Evolution Jeopardy

... of most major animal groups.  C. It was caused by tectonic instability, resulting in an eruption of multiple volcanoes.  D. It was the event in which life began, but no fossils survive and little is known. ...
< 1 ... 122 123 124 125 126 127 128 129 130 ... 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 © 2026
  • DMCA
  • Privacy
  • Terms
  • Report