Biology is designed for multi-semester biology courses for science majors. It is …
Biology is designed for multi-semester biology courses for science majors. It is grounded on an evolutionary basis and includes exciting features that highlight careers in the biological sciences and everyday applications of the concepts at hand. To meet the needs of today’s instructors and students, some content has been strategically condensed while maintaining the overall scope and coverage of traditional texts for this course. Instructors can customize the book, adapting it to the approach that works best in their classroom. Biology also includes an innovative art program that incorporates critical thinking and clicker questions to help students understand—and apply—key concepts.
By the end of this section, you will be able to:Define species …
By the end of this section, you will be able to:Define species and describe how species are identified as differentDescribe genetic variables that lead to speciationIdentify prezygotic and postzygotic reproductive barriersExplain allopatric and sympatric speciationDescribe adaptive radiation
This resource is a video abstract of a research paper created by …
This resource is a video abstract of a research paper created by Research Square on behalf of its authors. It provides a synopsis that's easy to understand, and can be used to introduce the topics it covers to students, researchers, and the general public. The video's transcript is also provided in full, with a portion provided below for preview:
"Oceans connect all life and affect climate worldwide, and interestingly, the ocean’s smallest residents have a huge role in this process. The ocean microbiota modulates global biogeochemical cycles, which influences energy balance in the atmosphere. Unfortunately, the underlying factors structuring the ocean microbiota are unclear, and better understanding is needed to help combat the effects of global climate change. A recent study examined the ecological mechanisms shaping the smallest surface-ocean microbiota: prokaryotes and picoeukaryotes. Researchers identified patterns in DNA sequencing data collected by two global ocean expeditions, Malaspina-2010 and Tara Oceans. Their results showed that different ecological mechanisms affect prokaryotes vs. picoeukaryotes. While picoeukaryotes were largely structured by dispersal limitation, displaying higher differentiation between communities, prokaryotes were structured by a combination of temperature-driven selection, dispersal limitation and random drift..."
The rest of the transcript, along with a link to the research itself, is available on the resource itself.
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