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 chapter, you will be able to:Describe the …
By the end of this chapter, you will be able to:Describe the roles of male and female reproductive hormonesDiscuss the interplay of the ovarian and menstrual cyclesDescribe the process of menopause
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:
"Changes in day length, or photoperiod, help regulate seasonal breeding in some mammals by altering hormone levels and aggression. Photoperiod changes can also affect the gut microbiota, and gut microbes can influence hormone secretion and sperm production. However, it’s unclear if the gut microbiota participates in photoperiod-mediated regulation of seasonal breeding. To find out, researchers recently examined the reproductive parameters and microbiomes of male Brandt’s voles exposed to short- or long-day conditions. They found that changing the photoperiod altered the voles’ reproductive hormone and gene expression levels. as well as their gut microbiome compositions. In addition, specific microbes were associated with the reproductive changes that occurred during acclimation to a new photoperiod. Transplantation of gut microbes from short- or long-day-exposed voles into recipient voles induced hormonal and genetic changes (dashed arrows)..."
The rest of the transcript, along with a link to the research itself, is available on the resource itself.
Travel with Scripps marine biologist, Dr. Jeffrey Graham, to swamps, jungles, and …
Travel with Scripps marine biologist, Dr. Jeffrey Graham, to swamps, jungles, and isolated islands where he probes the world of air breathing fishes and asks the question, why breathe air? (53 minutes)
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