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Semiotic freedom - Jesper Hoffmeyer`s Website
Semiotic freedom - Jesper Hoffmeyer`s Website

... operate in the first place.4 If organisms did not exhibit aboutness, if they did not “take an interest” in the world around them (if they did not “strive” – to use Darwin’s own term), there would be no “competition for survival” but only disorganized activity leading nowhere. However, if natural sele ...
The Scientific Method - Academic Computer Center
The Scientific Method - Academic Computer Center

... 2. Darwin read an essay by Malthus, an economist, which proposed that human population reproduce beyond past their resources and in doing so create competition for scarce resources. 3. Darwin applied this concept to all biological organisms. a. All organisms over-reproduce, which creates competition ...
PDF
PDF

... that the organisms made—e.g., fighting between males or females preferring males with big horns in titanotheres, eating bamboo in pandas—is very likely driven by behavioral persistence, possibly combined with phenomena such as genetic drift. That is, the very instigators of evolutionary trends that ...
Chapter15_Section03_edited
Chapter15_Section03_edited

... Survival of the Fittest The ability of an individual to survive and reproduce in its specific environment is fitness. Darwin proposed that fitness is the result of adaptations. An adaptation is any inherited characteristic that increases an organism's chance of survival. ...
15-3 Darwin Presents His Case
15-3 Darwin Presents His Case

... Summary of Darwin's Theory Individual organisms differ, and some of this variation is heritable. Organisms produce more offspring than can survive, and many that do survive do not reproduce. Because more organisms are produced than can survive, they compete for limited resources. Slide 33 of 41 Copy ...
Best Adapted Beak - Community Resources for Science
Best Adapted Beak - Community Resources for Science

... and allow organisms to thrive in their environment. Although one adaptation might be very useful for a certain species in a specific environment, that same trait might not be useful for another species in a different environment. To understand how adaptations arise, it helps to understand the proces ...
3-5 - Wave Foundation
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... Adaptation – The process by which an animal or plant species becomes fitted to its environment through body parts and behaviors. Behavior – Anything that an organism does involving action and response to stimulation. Camouflage – Concealing coloration, background matching in animals, the use of biol ...
Russian comparative embryology takes form: a conceptual
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... species. He did not, however, think that natural selection, alone, was sufficient to cause such evolution. Indeed, in his later years, von Baer writes to the evolutionary biologist Anton Dohrn: “I cannot help but find transmutation probable to a high degree; but I cannot declare Darwin's hypothesis ...
Chapter 10: Natural Selection
Chapter 10: Natural Selection

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TECHNOLOGICAL DESIGN AS AN EVOLUTIONARY PROCESS
TECHNOLOGICAL DESIGN AS AN EVOLUTIONARY PROCESS

... Basalla holds that the mechanism by which new variants of artifacts are created is not the mechanism of mutation and recombination. It is usually a mechanism involving conscious human choices. Likewise, the selection of artifacts is not a blind process, as it also involves human choice. Basalla cla ...
Evolution chapter 15 honors
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... Darwin saw fossils as a record of the history of life on Earth. By comparing fossils from older rock layers with fossils from younger layers, scientists could document that life on Earth has changed over time. ...
Atomism, epigenesis, preformation and preexistence: a clarification
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old world monkeys - Assets - Cambridge
old world monkeys - Assets - Cambridge

... As Cliff Jolly recalls, the inadequacy of the prevailing, one-dimensional view of the cercopithecids was brought home to John Napier during in his investigation of the early Miocene catarrhines, especially Proconsul africanus (now P. hesloni). At the time, discussions of the evolutionary position of ...
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... each slight variation, if useful, is preserved, by the term Natural Selection. —Charles Darwin from "The Origin of Species" ...
Exercise 5 - McGraw Hill Higher Education
Exercise 5 - McGraw Hill Higher Education

... Red pigments, phycobilins, mask chlorophyll in this group of seaweeds, hence their common name. Red seaweeds, however, are not always red. Their color may vary from olive green to almost black, sometimes as the result of the amount of exposure to light. This group contains the largest number of spec ...
Biology Test Out Bring at least two #2 pencils Test will be multiple
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... The life sciences are changing in ways that have important implications for high school biology. Many of these changes concern our understanding of the largest and the smallest living systems. Molecular biology continues to produce new insights into how living systems work and how they are connected ...
Chapters 15
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... Did the Patagonian hare resemble a rabbit because the two types of animals were adapted to the same type of environment? Both animals ate grass, hid in bushes, and moved rapidly using long hind legs. Did the Patagonian hare have the face of a guinea pig because of common descent with guinea pigs? ...
Evolution Jeopardy
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Senescence as an Adaptation to Limit the Spread of
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... The genetics and phenomenology of senescence suggest the hallmarks of an adaptation; but the effect of senescence on individual fitness is negative, so theorists have preferred to regard it as a non-adaptive byproduct of selection. We ask whether the possibility that senescence is an adaptation in i ...
CHAPTER 3 WATER AND LIFE
CHAPTER 3 WATER AND LIFE

... resources to help your students develop these skills. The Write About a Theme questions at the end of each chapter are an attempt on the part of the authors to partner with you in this endeavor. At the end of each chapter, we ask the student to write a short essay of 100-150 words that relates the m ...
Evolutionary Psychology 101
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... lead to survival, evolutionary psychologists are interested in processes that may lead to reproductive benefits—sometimes even at a cost to survival. In fact, this broad mechanism of evolutionary change, referred to as sexual selection, may well be the dominant force in helping us understand many un ...
Extinctions: Georges Cuvier
Extinctions: Georges Cuvier

... How does life begin? At the dawn of the nineteenth century, naturalists were staring through microscopes in hopes of finding the answer. In the process, they discovered some peculiar things about embryos. A chicken may look very different from a fish, but their embryos share some striking similariti ...
Fisheries-induced evolution of maturation reaction norms
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... The potential for fisheries-induced adaptive changes ∎ The commercial exploitation of fish stocks may not only have demographic consequences on the target species, but may also induce adaptive changes in their life history because fishing is by essence selective (Stokes et al. 1993, Palumbi 2001, As ...
Chapter 8 Developing a Theory of Evolution
Chapter 8 Developing a Theory of Evolution

... his ideas about changes in species over time. By comparing current species of animals with fossil forms, Lamarck observed what he interpreted as a “line of descent,” or progression, in which a series of fossils (from older to more recent) led to a modern species. He thought that species increased in ...
amazing adaptations - The Living Rainforest
amazing adaptations - The Living Rainforest

... This species is one of the smallest primates in the world (body-12/13 cm, tail 17/23 cm) and are monogamous, living in small family groups of up to 6 in the wild. Adaptations: Pygmy marmosets are gumivores (sap eaters) and have specially adapted teeth to gouge holes or notches in bark so they can co ...
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Adaptation

In biology, an adaptation, also called an adaptive trait, is a trait with a current functional role in the life history of an organism that is maintained and evolved by means of natural selection. Adaptation refers to both the current state of being adapted and to the dynamic evolutionary process that leads to the adaptation. Adaptations enhance the fitness and survival of individuals. Organisms face a succession of environmental challenges as they grow and develop and are equipped with an adaptive plasticity as the phenotype of traits develop in response to the imposed conditions. The developmental norm of reaction for any given trait is essential to the correction of adaptation as it affords a kind of biological insurance or resilience to varying environments.
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