background preloader

Introductory Biology

Introductory Biology

Related:  Biology Lessons & Terms

Camoflauge in Animals Mimicry Some animals and plants look like other things -- they mimic them. Mimicry is another type of deceptive coloration. 10 Awesome Online Classes You Can Take For Free Cool, but you need iTunes for nearly everything, and that gets an 'F.' Are there really no other places to get these lessons? I was sure there are some on Academic Earth. Flagged 1. 7 of them are available via YouTube. A Singular Creation Art Community We would like to ing you this feature tutorial by Linda Bergkvist, renowned in the digital arts community for her gorgeous portrayal of characters. In this tutorial, Linda shows us step by step how she paints realistic eyes. About Linda Bergkvist Linda Bergkvist is a renowned digital artist who currently lives in Sweden. Linda Bergkvist's website can be found at

Genetics and the tree of life We traditionally think about the tree of life in terms of Kingdoms: plants, animals, fungi, bacteria, etc. Genetics has really revolutionized the way we think about the tree of life and, because our classifications should reflect ancestry (that is, who is more closely related to whom), it has actually called into question a lot of our traditional classifications. Most biologists split up life into three domains: Archaea, Bacteria, and Eucarya (the last of which includes animals, plants, fungi, etc.). The three domains of life. From Carl Zimmer's blog The Loom.

The Mirror Equation Ray diagrams can be used to determine the image location, size, orientation and type of image formed of objects when placed at a given location in front of a concave mirror. The use of these diagrams was demonstrated earlier in Lesson 3. Ray diagrams provide useful information about object-image relationships, yet fail to provide the information in a quantitative form. Monophyletic, Paraphyletic, Polyphyletic defined 17th July 2003 Question What do terms like monophyletic, paraphyletic and polyphyletic mean? Answer These terms are used to describe groupings of organisms, and indicate the extent to which they can be considered as ``natural groups''. Evolution is a Fact and a Theory Copyright © 1993-2002 [Last Update: January 22, 1993] hen non-biologists talk about biological evolution they often confuse two different aspects of the definition. On the one hand there is the question of whether or not modern organisms have evolved from older ancestral organisms or whether modern species are continuing to change over time. On the other hand there are questions about the mechanism of the observed changes... how did evolution occur? Biologists consider the existence of biological evolution to be a fact.

30 Poster Design Tutorials for Photoshop Photoshop allows designers to create amazing posters that can be used for a variety or purposes like movie promos, product promos, event promos, as well as just for fun and practice. There are a lot of quality tutorials out there that teach the process of designing a poster in Photoshop. In this post we’ll feature 30 poster tutorials from a variety of different designers. In this collection you should find at least a few tutorials that teach something that could be helpful in your own work. Looking for hosting? WPEngine offers secure managed WordPress hosting.

The Evolution of the Human Eye The Evolution of the Human Eye Sean D. Pitman M.D. © May. 2001 How do I find the number of protons, electrons and neutrons that are in an atom of...? How many protons, electrons and neutrons are in an atom of krypton, carbon, oxygen, neon, silver, gold, etc...? To find the number of protons, electrons and neutrons in an atom, just follow these easy steps: Step 1 - Gather Information The first thing you will need to do is find some information about your element. Go to the Periodic Table of Elements and click on your element. If it makes things easier, you can select your element from an alphabetical listing.

Engineered stem cells seek out and kill HIV in living mice Expanding on previous research providing proof-of-principle that human stem cells can be genetically engineered into HIV-fighting cells, a team of UCLA researchers have now demonstrated that these cells can actually attack HIV-infected cells in a living organism. The study, published April 12 in the journal PLoS Pathogens, demonstrates for the first time that engineering stem cells to form immune cells that target HIV is effective in suppressing the virus in living tissues in an animal model, said lead investigator Scott G. Kitchen, an assistant professor of medicine in the division of hematology and oncology at the David Geffen School of Medicine at UCLA and a member of the UCLA AIDS Institute. "We believe that this study lays the groundwork for the potential use of this type of an approach in combating HIV infection in infected individuals, in hopes of eradicating the virus from the body," he said.

Psychopathic Traits Linked to Brain Reward System - NIH Research Matters March 29, 2010 People who scored high on a test that measures impulsive and antisocial traits had exaggerated brain responses to certain “rewards,” like winning money or taking stimulant drugs. The new study provides evidence that a dysfunctional brain reward system may underlie vulnerability to a personality disorder known as psychopathy. Genetic drift v. Natural selection Genetic drift or allelic drift is the change in the frequency of a gene variant (allele) in a population due to random sampling.[1] The alleles in the offspring are a sample of those in the parents, and chance has a role in determining whether a given individual survives and reproduces. A population's allele frequency is the fraction of the copies of one gene that share a particular form.[2] Genetic drift may cause gene variants to disappear completely and thereby reduce genetic variation. Analogy with marbles in a jar[edit]

Related:  vanima_centabiologyvidnkBiologyBiologyBiologyeducationalLiving Environmentreprise23To be learnedEducationalMarine Biologybiologyscience of biologyacademic toolz