Nucleus Medical Media: Medical Video, Animation & Illustration. Anatomy of Animals. Contents Animals Sponges Cnidarians Flatworms Roundworms Mollusks Annelids Arthropods Echinoderms Chordates - Fishes, Amphibians, Reptiles, Birds, Mammals, Primates Animals Table 01 Animal Features.
Red Gold . Blood History Timeline . 2500 BCE-999 BCE. The Cell 5e. Home Welcome to the Companion Website for The Cell: A Molecular Approach, Fifth Edition, by Geoffrey M.
Cooper and Robert E. Hausman, published by ASM Press and Sinauer Associates. This site is designed to help you review and master key concepts, facts, processes, and terminology introduced in the textbook through a variety interactive learning resources. To get started, select a chapter and a category from the pull-down menus above and click "Go," or click a category in the list on the left. Meiosis: An Interactive Animation. Diploid Cell (2N): From a preceding mitotic division, the Oogonium (Spermatogonium) enters meiosis with DIPLOID (2N) chromosomes but TETRAPLOID (4N) DNA.
Chromosomes then duplicate to produce SISTER CHROMATIDS (or HOMOLOGOUS DYADS). Prophase I: Dyad pairs align to create "TETRADS", non-sister chromatids connect and trade sections at a "CHIASMA", a process called "CROSSING OVER". Metaphase I: SPINDLE FIBERS attach to each dyad at the KINETOCHORE. Tension from spindle fibers aligns the tetrads at the cell equator.
Communicating at an unknown rate. From Eric Weisstein's World of Chemistry. 7.014 Introductory Biology. Biology Tutorials - Biology-Online.org. Turritopsis nutricula. Turritopsis nutricula is a small jellyfish.
Several different species of the genus Turritopsis were formerly classified as T. nutricula, including the "immortal jellyfish" which is now classified as T. dohrnii.[2] References[edit]