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:Explain the …
By the end of this section, you will be able to:Explain the differences in animal body plans that support basic animal classificationCompare and contrast the embryonic development of protostomes and deuterostomes
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:
"A new study shows that a novel embryonic cleavage pattern can evolve without affecting other developmental traits. But let’s start at the beginning. The earliest stages of animal development – the moments following fertilization of the egg – involve a sequence of cell divisions that will eventually turn a zygote into a multicellular embryo. This process is termed _cleavage_. Two cells become four. Four cells become eight. Etcetera. But it’s not just the addition of new cells that is important in this process – it’s also their orientation. Just as there are all shapes and sizes of animals, the pattern of early cell division varies across different organisms. In some animals, these cleavage patterns play the crucial role of precisely positioning early embryonic cells in just the right way. A single misplaced cell can have catastrophic consequences for the growing embryo..."
The rest of the transcript, along with a link to the research itself, is available on the resource itself.
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