Helen Plum Library

In this video lesson, Paul Andersen explains the importance of biodiversity. He starts by describing how biodiversity can be species, genetic, or ecosystem diversity. He explains the importance of keystone species in an environment and gives two examples: the jaguar and the sea otter. He finishes with a quote from the father of biodiversity, E.O. Wilson.--Publisher.

In this video lesson, Paul Andersen explains important concepts that cannot be explained by simple Mendelian genetics. He begins with a discussion of polygenic inheritance and uses a simulation on height to show how a bell shape curve of phenotypes is produced. He then discusses the importance of linked genes and those that are found on the sex chromosome. A simple punnett square showing the inheritance of the color blind gene is included.--Publisher....

In this video lesson, you will learn to choose the best measure of center and variability by comparing each measure to data in a real world context.--Publisher.

In this video lesson, Paul Andersen describes the four major biological molecules found in living things. He begins with a brief discussion of polymerization. Dehydration synthesis is used to connect monomers into polymers and hydrolysis breaks them down again. The major characteristics of nucleic acids are described as well as there directionality from 3' to 5' end. Protein structure is described as well as the structure of its monomers, amino acids....

In this video lesson, you will learn how to identify the key features of a parabola by examining how the coefficients in the equation affect its graph. The lesson covers topics such as finding the 0s, the vertex, and axis of symmetry, as well as how different coefficients impact the shape and direction of the parabola. The video gives step-by-step instructions and examples to help viewers understand the concept.--Publisher.

In this video lesson, you will learn about inverse trigonometric functions by doing problems involving right triangles with given side lengths.--Publisher.

In this video lesson, you will learn how to add fractions with unlike denominators by using fraction bars.--Publisher.

In this video lesson, you will learn to identify variables and their relationship given a real-world scenario.--Publisher.

In this video lesson, Paul Andersen explains how changes in the genotype of an individual can affect the phenotype. He explains how mutations can be neutral, beneficial, or harmful. He also explains how mistakes in the cell cycle can lead to disorder, sterility, or new species.--Publisher.

In this video lesson, you will learn to divide a fraction by a fraction by thinking about equal sized groups.--Publisher.