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:Describe the …
By the end of this section, you will be able to:Describe the features that characterized the earliest animals and when they appeared on earthExplain the significance of the Cambrian period for animal evolution and the changes in animal diversity that took place during that timeDescribe some of the unresolved questions surrounding the Cambrian explosionDiscuss the implications of mass animal extinctions that have occurred in evolutionary history
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:
"Microorganisms exist in nearly every part of our planet, including areas that can barely support life. The McMurdo Dry Valleys of Antarctica were considered lifeless until microbial communities were found inside porous rocks. Little is known about the evolution, diversity, and genetics of these exclusive cryptoendolithic life-forms. Recently, researchers used sequencing technology to generate microbial metagenomes from Antarctic rocks. They obtained 497 bacterial genomes from 269 previously uncharacterized candidate species. “Candidatus Jiangella antarctica” may be adapted to severe conditions, as it was found in all samples and contained additional genes. Most of the new species diverged from their known relatives 1.2 billion to 410 million years ago, long before the origin of modern Antarctica, and the Antarctic bacteria are functionally distinct from their closest known relatives, suggesting that groups of cold-adapted bacteria arrived when Antarctica became cold, spread, and diversified..."
The rest of the transcript, along with a link to the research itself, is available on the resource itself.
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