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 different types of variation in a populationExplain why only heritable variation can be acted upon by natural selectionDescribe genetic drift and the bottleneck effectExplain how each evolutionary force can influence the allele frequencies of a population
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:
"Lignocellulose is a major component of the woody portion of plants. The polymers it houses, like xylan and cellulose, could be used as biofuels or in other plant-based materials. The breakdown of lignocellulose requires specialized carbohydrate-active enzymes (CAZymes), but targeted discovery of novel CAZymes is difficult due, in part, to their structural diversity. In a recent paper, researchers have proposed a new method to speed up this process. They combined phenotype-based selective pressure with functional profiling to screen unknown enzymes. Feeding cattle a forage-based diet applies selective pressure on their rumen microbiota for microbes with specialized fiber-degrading enzymes. Three glycoside hydrolase families had increased abundance in feed-efficient cattle compared to their inefficient counterparts on this diet. Screening some members of those families against a database of uncharacterized enzymes led to the identification of putative xylanases and endoglucanases..."
The rest of the transcript, along with a link to the research itself, is available on the resource itself.
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