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File:Greater frigate bird displayYou can see that this display of sexual selection works for this bird in the end. hollering at the ladies
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File:Wild orchid wasp mimic - David Attenborough - BBCThis incredible plant dupes wasps into thinking they're mating, while loading them with pollen. From the BBC.
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File:Solving Hardy Weinberg ProblemsPaul Andersen shows you how to solve simple Hardy-Weinberg problems. He starts with a brief description of a gene pool and shows you how the formula is derived. He then shows you how to
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File:Richard Dawkins Vestigial Organs The Wings of the Flightless Cormorant-0Richard Dawkins explains how vestigial organs like the stubby wings of the Flightless Cormorant were one of Darwin's key arguments for Evolution. Download Quicktime version (720p HD): http://cdn.cloudfiles.mosso.com/c116791/flightless
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File:Founder Effect, Bottle Necking, and Genetic DriftDescription to be added later. Description to be added later.
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Evolution of Bats
Together all participants in Project Dragonfly Issues in Evolution Advanced Seminar in Fall 2013 will contribute words, definitions and explanations to a collaborative wiki. We will use this to advance our understanding of biological evolution -
Predator-Prey Coevolution
Coevolution is a cyclic process in which the adaptations of one organism in an ecosystem drive the adaptations of another organism. These adaptations then cause the first organism to adapt to keep up (Brockhurst& Koskella -
Human Family Tree
The fossil record has revealed evidence of human evolution. Fossils allow scientists to analyze how body size/structure, brain size, diet, and locomotion has changed over the past 6 million years. Radiometric dating makes determining -
Types of Sexual Selection
There are two types of sexual selection: Intrasexual and Intersexual. Intrasexual selection deals with members of the same sex in a given species. An example of this can be seen in elephant seals, polar bears -
Group vs. Individual Selection
Different selection pressures might favor a group or an individual and lead to group or individual adaptations. Group selection refers to pressures that lead to group adaptations and more altruistic traits. Individual selection refers to -
Bottleneck Effect
Genetic drift can cause big losses of genetic variation for small populations. Population bottlenecks occur when a population’s size is reduced for at least one generation. Because genetic drift acts more quickly to reduce -
Cope's Rule
Cope's Rule The evolutionary trend toward a larger body size overtime, which is seen in both carnivore and herbivore species (Van Valkenburgh et al., 2004). -
Sickle-Cell Anemia and Malaria Connection
300px Sickle-Cell anemia is a disease that has a short life expectancy, but carriers of this disease are resistant to the sickness Malaria -
Sneaky F*uckers
The term "sneaky fuckers" was coined by evolutionary biologist John Maynard Smith to describe subordinate males who take advantage of the opportunity to mate with females while dominant males are otherwise occupied, leading to their -
Pelagic zone
300px Any water in a sea or lake that is neither close to the bottom nor near the shore can be said to be in the pelagic zone. The word pelagic comes from the Ancient -
Recessive Epistasis
Recessive epistasis is the phenomena in which the expression of one gene pair is dependent on another gene pair (OpenStax College, 2013). In other words, one gene must be turned on for another gene to -
Analogous structures
Structures in different species that look alike or perform similar functions (e.g., the wings of butterflies and the wings of birds) that have evolved convergently but do not develop from similar groups of embryological -
What are Structural Adaptations?
Structural adaptations are physical features on an animal that have evolved over time to help them survive and breed. Adaptations usually occur because of gene mutations or changes by accident. For example, if one day -
Intrasexual Selection vs. Intersexual Selection
When discussing competition for mates, there are two different forms of sexual selection. Intrasexual Selection: Members of the competitive sex fight amongst themselves and the key event determines reproductive success whether it be fighting directly -
File:Geologic time scale.jpg
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File:Genetic Drift-1Very visual and simplified explanation for founder effect and bottleneck effect causing genetic drift.
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File:Homologous vs Analogous Traits Evolution series pt1Part 1 of a series on the topic of evolution. In this video I will be talking about homologous and analogous traits.
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File:Convergent evolution-caninescanine convergrent evolution podcast, part of biofundamentals-2012 canine convergrent evolution podcast, part of biofundamentals-2012
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File:Social ShrimpsFrom BBC the series of The Blue Planet these amazing shrimps are shown in the episode of Coral Seas. Fantastic how besides bees, ants and wasps also shrimps have developed an altruistic social structure with
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File:Speciation-0California salamanders are a case of evolution in action. Video from PBS. California salamanders are a case of evolution in action. Video from PBS.
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Terraria Wiki
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The Official Terraria Wiki is a comprehensive resource containing information about all versions of Re-Logic's action-adventure sandbox game, Terraria.