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Biology 101: Intro to Biology Course - Free Online Courses

Biology 101: Intro to Biology Course - Free Online Courses
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Nature and Raptor Center of Pueblo Biology News Jan. 5, 2016 — Examination could hold wider applications on how stress during pregnancy affects mothers and ... read more Jan. 5, 2016 — Parasitoid wasps manipulate their caterpillar hosts into eating a more wasp-friendly diet, report investigators. It turns out that when caterpillars eat more carbs, the wasp larvae that chew their ... read more Jan. 5, 2016 — Eating increases the amount of damaging reactive molecules in the body, potentially shaping and constraining life history evolution across animal groups, new research on snakes ... read more Jan. 5, 2016 — A new study demonstrates the role of nanostructured biphasic morphology of segmental polyurethanes as a matrix signal for organization of endothelial cells into network ... read more Jan. 4, 2016 — Researchers have clarified the mechanism of rotation of node cilia, which determines the left-right asymmetry of the body. A Far from Perfect Host Saffron-Based Crocin Prevents Liver Cancer: Preclinical Studies and Beyond

The Molecular Clock and Estimating Species Divergence | Learn Science at Scitable A recent study by Weir and Schluter (2008) demonstrates the use of different calibration techniques. To estimate the evolutionary rate of the mitochondrial gene encoding cytochrome b in birds, Weir and Schluter chose 90 different calibrations derived from dated fossils and from the formation ages of land bridges, oceanic islands, and mountain ranges. They then used a statistical method to check each of these calibrations and discarded 16 that were found to be inconsistent. Using the remaining 74 calibrations, the duo estimated that cytochrome b genes in birds evolve at an average rate of approximately 1% per 1 million years, meaning that any two bird species are diverging from each other at a rate of 2% per 1 million years. This has long been regarded as a standard quantity in genetic studies of birds and is known as the "2% rule." Weir and Schluter also noted that the rate of molecular evolution varies significantly among different bird species.

Semicolons Today's topic is semicolons. I get questions about semicolons a lot, so it's time to clear up some confusion. Use Semicolons to Separate Things and Add Variety Semicolons separate things. Most commonly, they separate two main clauses that are closely related to each other but that could stand on their own as sentences if you wanted them to. Here's an example: "It was below zero; Squiggly wondered if he would freeze to death." One reason you might choose to use a semicolon instead of a period is if you wanted to add variety to your sentence structure, for example, if you thought you had too many short, choppy sentences in a row. What's the Difference Between a Semicolon and a Colon? People often ask me what the difference is between a semicolon and a colon, and there are a couple of differences. Semicolons separate things. One way that I remember this is to think of the different elements as railroad cars. When to Use Semicolons, When to Use Commas References 1. Diversions

Cellular Respiration Demo using Gummy Bears - Exciting!! This is a very simple demonstration that makes an impact. It illustrates energy release that occurs quickly. In the demonstration, Mr. Carter (the other science teacher at my school) visually reinforces the necessity of cellular metabolism’s small-step oxidation of glucose instead of releasing it all at once. The materials you will need for this demonstration are as follows: Approximately 1 tablespoon of Potassium ChlorateLarge test tubeGummy bear (or any other gummy animal)Fume hood (or any system to allow for the fumes to escape without engulfing the room)Eye protection (Lab Goggles, etc) The solid should be heated until it melts, and then the gummy bear can be dropped in. The products of the reaction should be potassium chloride (white deposit near the mouth of the test tube) as well as varying amounts of soot or charred gummy bear if not all of it is used up in the reaction. This kind of “all at once” release of energy would be catastrophic in a living organism.

OneZoom Tree of Life Explorer Teacher Toolbox Home » Teacher Toolbox This page contains documents and links I used in teacher workshops I conducted as part of the NSF GK-12 Program at the Environmental Science Institute at the University of Texas at Austin, or referred to in training sessions I currently conduct for the National Math and Science Initiative. These files will be updated periodically as new workshops are developed. Although I am no longer formally associated with the Environmental Science Institute, I remain a strong supporter of their work. For more information on the Hot Science - Cool Talks outreach lectures, teacher workshops, and other programs, please visit the Environmental Science Institute website at www.esi.utexas.edu I do not post materials from the National Math & Science Initiative on this site. Editable 2013 AP Biology Syllabus in Pages (ZIP 961 KB)This is the original format. Editable 2013 AP Biology Syllabus in Word (DOC 0.99 MB) Editable 2013 APES Syllabus in Pages (ZIP 2.72 MB) What Is a Nanometer?

Gardening - Gardening Guides - Techniques - Taking pelargonium cuttings Videos Articles - stem cells, ecology and neuroscience Most Recent Fly on a String By The Scientist Staff | February 1, 2014 Fruit flies are fixed to a silica fiber in this new technique to aid neuroscientists in performing laser surgery prior to neuroimaging. 3 Comments Single Neuron-Imaging Bot New technology probes the functional unit of nervous transmission. 0 Comments Cortex Tour By Kelly Rae Chi | November 1, 2013 Travel through the outer layers of a mouse brain thanks to array tomography and Stanford University's Stephen Smith. 0 Comments Lozano on DBS By Andres Lozano | November 1, 2013 Neurosurgeon Andres Lozano discusses deep-brain stimulation in this TEDx talk. 0 Comments Mental Clarity Karl Deisseroth and his team at Stanford University make mouse brains transparent to explore their inner workings. 1 Comment Printing Ears By Kate Yandell | September 1, 2013 Cornell University biomedical engineer Lawrence Bonassar 3-D prints ears using “ink” that contains living cells. 2 Comments Making Meat By The Scientist Staff | September 1, 2013 0 Comments Frogcicle

Explore Biology | Teachers' Center | Biology Teaching Resources Welcome to the Teachers' Center at Explore Biology. Here you will find resources to help you teach biology at the high school level. Some of my Regents lectures are supported by Powerpoint presentations. If you are not familiar, Regents is a 10th grade very simplified introduction to Biology, that is limited by a state-wide exam. Check out what we're doing online to expand beyond the classroom to the virtual world -- to catch students wherever they hang out and entice them to think! These daily worksheets are aligned with the Raven (7th ed.) textbook. NOTE: I have moved all the molecule building activities over to AP Biology Lab & Activities Section Post-AP Activities -- what to do with the students after the AP exam Children's Book -- I have students produce a children's book based on one biology concept or subject. Summer Assignments Summer Assignment 2010 An archive of syllabi submitted for the AP audit to help you develop your own. A resource for AP teachers developing their curriculum.

Plant Growth Factors: Plant Hormones Thought Questions Explain the science behind the following gardening questions: 1. 2. Plant Hormones and Plant Growth Regulators Another factor in plant growth is the influence of plant hormones. Plant growth regulators are chemicals applied by a horticulturist to regulate plant growth. Plant Hormones Different hormones affect different plant processes. Auxins produced in the terminal buds suppress the growth of side buds and stimulate root growth. Figure 1. Gibberellins affect: The rate of cell division Flowering Increase in size of leaves and fruits Seed and bud dormancy Induction of growth at lower temperatures (used to green up lawns 2 to 3 weeks earlier) Cytokinins promote cell division, and influence cell differentiation and aging of leaves. Hormone Influence on Pruning Understanding hormones is key to proper pruning. Figure 2. Heading cuts (removal of a branch tip) releases the apical dominance caused by auxins from the terminal bud. Figure 3. Tropism Figure 4. Figure 5.

Top 10 Amazing Biology Videos | Wired Science Cyborgs, stem cells, glowing mice, and hilarious music videos are great reasons to be excited about biology. Here are some of our favorite clips from the life sciences. 10. Immune Cell Chasing a BacteriumIt may look like the predecessor to Pac Man, but this vintage clip shows a neutrophil wending its way through a crowd of red blood cells to destroy its bacterial nemesis. 9. How High Speed Gene Sequencing Works Within the next few years, Helicos BioSciences may be able to read an entire human genome for under one thousand dollars. 8. 7. 6. 5. 4. 3. 2. 1. Last week, regenerative medicine researchers announced that they have grown a new windpipe for a woman who was crippled by tuberculosis. See Also:

The Biology Project PWHS: Thermodynamics: Convection The Movement of Heat by Convection Heat can move from one place to another by the process of convection in any fluid (a word that includes liquids, gases and plasmas). This happens when one part of the fluid has a higher temperature than its surroundings, and thus expands. When it expands it becomes less dense, and therefore rises, while the colder fluid rushes in below to fill the space. The process of convection: is what makes all the water in a pot boil rather than just the water at the bottom is responsible for keeping lakes and oceans from freezing from the bottom up (see Water: the Great Anomaly handout) lets birds of prey and gliders fly without flapping their wings or using an engine is an essential part of many geologic processes is largely responsible for solar flares and the granulated appearance of the sun’s surface is responsible for the ‘great ocean conveyer belt’ which keeps the oceans circulating, which keeps much of Europe from freezing! Home

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