Biology 2e is designed to cover the scope and sequence requirements of a typical two-semester biology course for science majors. The text provides comprehensive coverage of foundational research and core biology concepts through an evolutionary lens. Biology includes rich features that engage students in scientific inquiry, highlight careers in the biological sciences, and offer everyday applications. The book also includes various types of practice and homework questions that help students understand—and apply—key concepts. The 2nd edition has been revised to incorporate clearer, more current, and more dynamic explanations, while maintaining the same organization as the first edition. Art and illustrations have been substantially improved, and the textbook features additional assessments and related resources.

By the end of this section, you will be able to do the following:

Define matter and elements
Describe the interrelationship between protons, neutrons, and electrons
Compare the ways in which electrons can be donated or shared between atoms
Explain the ways in which naturally occurring elements combine to create molecules, cells, tissues, organ systems, and organisms

Step-by-step explanations of the exponent laws including rules for combining powers and roots. Includes practice exercises.

In this video segment from WGBH, children make a dam with dirt, sticks, and stones to try to stop the flow of water.

A video lesson which illustrates how to identify and complete a synthesis chemical reaction. [8:08]

Chemical reactions are the foundation of chemistry, and understanding how elements combine and in what ratios helps us to understand the world around us. This pathway provides resources about how different chemicals react, and the ratios in which they react, a field of study known as Stoichiometry (literally: element measuring).

Emphasizing the design, build, and test steps of the engineering design process, groups create a ping-pong paddle. After building their paddle, students conduct tests and compare their design to a store-bought paddle and use a Venn diagram to organize their information. Based on their results, students write product reviews for their paddle. This project allows students to build and test a design, iterate upon that design as well as explore how data analysis of a product works.

For this learning module, students practice finding the product of two decimal numbers without calculating. Instead, they look at how many places to move the decimal point based on a sample equation. Includes video demonstrating a sample problem [1:30] and a set of practice questions.

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Students practice multiplication by multiplying two digit numbers by one digit numbers.

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Students practice recognizing the multiples of a number by watching a video and trying practice problems.

A free CK-12 account is required to view all materials.

Students are introduced to polymer science and take on the role of chemical engineers to create and test a plastic made from starch. After testing their potato-based plastic, students design a product that takes advantage of the polymer’s unique properties. At the end of the engineering design process, students present their product in a development “pitch” that communicates their idea to potential investors.

Students combine art, gaming culture and engineering by fabricating light-up patches to increase youngsters’ visibility at night. The open-ended project is presented as a hypothetical design challenge: Students are engineers who have been asked by a group of parents whose children go out Pokémon hunting at night to create glowing patches that they adhere to clothing or backpacks to help vehicle drivers see the kids in the dark. Student pairs create Pokémon character stencil designs cut from iron-on fabric patches, adding transparent layers for color. Placed over an EL (electroluminescent) panel that is connected to a battery pack, the stencils create glowing designs. Each team creates a circuit, which includes lengthening the EL panel wiring to make it easier to wear. Then they sew/adhere the patches onto hoodies, messenger bags, hats, pockets or other applications they dream up. The project concludes with team presentations as if to an audience of project clients. Keep the project simple by hand cutting and ironing/sewing, or use cutting machines, laser cutters and sewing machines, if available.

Students learn basic marketing concepts and use professional marketing techniques to compose an advertisement for a hybrid vehicle. In the process, they learn the principles of comparative analysis.

This video segment adapted from FETCH! shows contestants experimenting with different materials to see which is the best insulator and thus best able to keep the lemonade at their stand cool for customers.

Find out the procedure in determining the theoretical yield of a product in a chemical reaction. [6:25]

It's tempting to assume that technology is the key when it comes to reaching your audience and engaging them. However, creativity and innovation trump purely technological choices. This article explains the role of each in successfully marketing a product. (Published Oct. 24, 2019)