The video resource "The Sex Lives of Nonvascular Plants: Alternation of Generations - Crash Course Biology #36" is included in the "Biology" course from the resources series of "Crash Course". Crash Course is a educational video series from John and Hank Green.
Paul Andersen explains how signal transduction pathways are used by cells to convert chemical messages to cellular action. Epinephrine is used as a sample messenger to trigger the release of glucose from cells in the liver. The G-Protein, adenylyl cyclase, cAMP, and protein kinases are all used as illustrative examples of signal transduction.
Paul Andersen explains how signal transmission is used to alter both cellular function and gene expression. He uses the example of epinephrine release in humans and how it is used in the fight or flight response.
Hank introduces us to the "simplest" of the animals, complexity-wise: beginning with sponges (whose very inclusion in the list as "animals" has been called into question because they are so simple) and finishing with the most complex molluscs, octopuses and squid. We differentiate them by the number of tissue layers they have, and by the complexity of those layers.
The video resource "Simple Animals: Sponges, Jellies, & Octopuses - Crash Course Biology #22" is included in the "Biology" course from the resources series of "Crash Course". Crash Course is a educational video series from John and Hank Green.
This "Simple Stimuli Trigger Fixed Behaviors" learning object is the from the Sumanas resource series. Sumanas offers a robust selection of content and services that are directed at enhancing the learning experience.
Siyavula has produced book titles spanning Mathematics and Science subjects from Grades 4-12. These are high-quality, curriculum-aligned Open Educational Resources. This resources is a open textbooks has been developed collaboratively by a large group of contributors, including volunteers from South Africa and internationally, paid contributors and a in-house team. Each book project was managed by the Content Coordinator (a subject specialist responsible for the content, curriculum, workshop design, authoring and editing) and the Community Coordinator.
Hank introduces us to the framework of our bodies, our skeleton, which apart from being the support and protection for all our fleshy parts, is involved in many other vital processes that help our bodies to function properly.
The video resource "The Skeletal System: It's ALIVE! - CrashCourse Biology #30" is included in the "Biology" course from the resources series of "Crash Course". Crash Course is a educational video series from John and Hank Green.
In this video Paul Andersen shows you how a cross between mutant and wild types of Sordaria fimicola can be used to show and measure frequency of crossing-over. He begins by reviewing the process of meiosis in a typical organism. He then shows how crossing-over can affect the formation of sports in the perithecium of the fungi.
How a sodium potassium pump can maintain a voltage gradient across a cell or neuron's membrane
Paul 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 solve a couple of sample problems.
This "Sound Transduction" learning object is the from the Sumanas resource series. Sumanas offers a robust selection of content and services that are directed at enhancing the learning experience.
Part of NCSSM CORE collection: This animation shows the hybridization of an s-orbital and three p-orbitals to form four sp3 tetrahedral hybrid orbitals
Paul Andersen explains how reproductive isolation can eventually lead to speciation. Three main barriers to gene flow are included: geographic, pre-zygotic and post-zygotic. Both allopatric and sympatric speciation are discussed. A brief discussing of polyploidy and punctuated equilibrium are also included.
Hank explains speciation - the evolutionary process by which new biological species arise - in terms of finches, ligers, mules, and dogs.
The video resource "Speciation: Of Ligers & Men - Crash Course Biology #15" is included in the "Biology" course from the resources series of "Crash Course". Crash Course is a educational video series from John and Hank Green.
Paul Andersen details the evolutionary processes of speciation and extinction. Stickleback evolution in Lake Loberg is used as example of rapid speciation. Adaptive radiation is illustrated using the Hawaiian honeycreeper. A brief discussion of extinctions and mass extinctions is also included.
What a species is and isn't. Ligers, tiglons, mule, hinnies, and dogs
Part of NCSSM CORE collection: This animation shows the rotation of a p-orbital