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:

Describe the role of fungi in various ecosystems
Describe mutualistic relationships of fungi with plant roots and photosynthetic organisms
Describe the beneficial relationship between some fungi and insects

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

Identify the macronutrients needed by prokaryotes, and explain their importance
Describe the ways in which prokaryotes get energy and carbon for life processes
Describe the roles of prokaryotes in the carbon and nitrogen cycles

Describes how energy flows through an ecosystem.

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Students investigate decomposers and the role of decomposers in maintaining the flow of nutrients in an environment. Students also learn how engineers use decomposers to help clean up wastes in a process known as bioremediation. This lesson concludes 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 explore the concept of biodegradability by building and observing model landfills to test the decomposition of samples of everyday garbage items. They collect and record experiment observations over five days, seeing for themselves what happens to trash when it is thrown "away" in a landfill environment. This shows them the difference between biodegradable and non-biodegradable and serves to introduce them to the idea of composting. Students also learn about the role of engineering in solid waste management.

How matter is circulated throughout an ecosystem.

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How matter is circulated throughout an ecosystem.

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Students learn about energy flow in food webs, including the roles of the sun, producers, consumers and decomposers in the energy cycle. They model a food web and create diagrams of food webs using their own drawings and/or images from nature or wildlife magazines. Students investigate the links between the sun, plants and animals, building their understanding of the web of nutrient dependency and energy transfer.

Like all organisms, bacteria need energy, and they can acquire this energy through a number of different ways. Learn more about bacteria nutrition in this learning module produced by CK-12.

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Producers make their own food through photosynthesis. But many organisms are not producers and cannot make their own food, but must get their energy from other organisms. These organisms are called consumers. Decomposers get nutrients and energy by breaking down dead organisms and animal wastes. Learn more about consumers and decomposers in this learning module produced by CK-12.

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Animated introductory film on the basics of organisms from the Kingdom Fungi. Learn about what they are, how they live, and why they are important to us. [5:34]

This concise provides a brief definition of what a scavenger is and then profiles several scavengers (flies, wasps, and cockroaches).

Students gain an understanding of the parts of a plant, plant types and how they produce their own food from sunlight through photosynthesis. They also learn about transpiration, the process by which plants release moisture to the atmosphere. With this understanding, students test the effects of photosynthesis and transpiration by growing a plant from seed. They learn how plants play an important part in maintaining a balanced environment in which the living organisms of the Earth survive. This lesson is part of a series of six lessons in which students use their evolving understanding of various environments and the engineering design process, to design and create their own model biodome ecosystems.

Students explore how plastic pollution is choking the world’s oceans, and explore a variety of solutions for reducing plastic waste and reducing the amount of plastic that ends up in the ocean.