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 biogeography
List and describe abiotic factors that affect the global distribution of plant and animal species
Compare the impact of abiotic forces on aquatic and terrestrial environments
Summarize the effects of abiotic factors on net primary productivity

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

Define ecology and the four basic levels of ecological research
Describe examples of the ways in which ecology requires the integration of different scientific disciplines
Distinguish between abiotic and biotic components of the environment
Recognize the relationship between abiotic and biotic components of the environment

Videos, texts, activities, and assessments about the factors that characterize living things.

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Anaken lives with his brother Kiko on a beautiful island. Today they are learning about life processes. Join them and find out what they learn.

Martin Dahl, a Danish scientist, does research on living things and non-living things. Come see what he discovers.

In this module, students will learn about the cycles of nature (water, carbon, nitrogen, and phosphorus) that support the flow of nutrient matter through an ecosystem, as distinct from the flow of energy. Includes learning activities, a study guide, flashcards, and quizzes.

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Understand the flow of energy and matter through ecosystems and what happens if an ecosystem is disrupted. [8:56]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

In this activity, students create a "web" to identify and demonstrate the interactions among the living and non-living parts of an environment. This information allows students to better understand what an environment is and to also consider how engineers use teamwork to solve problems.

Students explore the biosphere and its associated environments and ecosystems in the context of creating a model ecosystem, learning along the way about the animals and resources. Students investigate different types of ecosystems, learn new vocabulary, and consider why a solid understanding of one's environment and the interdependence of an ecosystem can inform the choices we make and the way we engineer our communities. This lesson is part of a series of six lessons in which students use their growing understanding of various environments and the engineering design process, to design and create their own model biodome ecosystems.

Students are introduced to the concept of an environment and the interactions within it through written and hands-on webbing activities. They also learn about environmental engineering careers and the roles of these engineers in our society.

What is it that distinguishes a living organism from a nonliving object? This video presents examples that aren't as clear-cut as one might think, enticing students to question what it means to be alive. [3:02]

See how organisms each have their own role in the ecosystem.

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What is it that distinguishes a living organism from a nonliving object? This collection of images presents examples that aren't as clear-cut as one might think, enticing students to question the meaning of life.

Andrea lives on the Marshall Islands, and she will teach you about living and nonliving things.

Follow this group of students through their scavenger hunt in the estuary. Take a look at the living and nonliving things that make this ecosystem a special place. [9:38]

Students learn about population density within environments and ecosystems. They determine the density of a population and think about why population density and distribution information is useful to engineers for city planning and design as well as for resource allocation.