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  2. DocHub - Wikipedia

    en.wikipedia.org/wiki/Dochub

    DocHub is an online PDF annotator and document signing platform that can work on desktop platforms and mobile platforms founded by DocHub and Macroplant CEO Chris Devor in Boston, Massachusetts, United States, [2] with headquarter regions in the Greater Boston Area, East Coast, and New England. DocHub has several features that lets users add ...

  3. List of unsolved problems in biology - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    In biological organisms, amino acids appear almost exclusively in the left-handed form and sugars in the right-handed form. Homochirality is an obvious characteristic of life on Earth, yet extraterrestrial samples contain largely racemic compounds. [ 7 ]

  4. Biology - Wikipedia

    en.wikipedia.org/wiki/Biology

    [33] [34] Carbon can form covalent bonds with up to four other atoms, enabling it to form diverse, large, and complex molecules. [33] [34] For example, a single carbon atom can form four single covalent bonds such as in methane, two double covalent bonds such as in carbon dioxide (CO 2), or a triple covalent bond such as in carbon monoxide (CO).

  5. List of biological databases - Wikipedia

    en.wikipedia.org/wiki/List_of_biological_databases

    They are capable of merging information from different sources and making it available in a new and more convenient form, or with an emphasis on a particular disease or organism. Originally, metadata was only a common term referring simply to data about data such as tags, keywords, and markup headers.

  6. Identification key - Wikipedia

    en.wikipedia.org/wiki/Identification_key

    In biology, an identification key, taxonomic key, or frequently just key, is a printed or computer-aided device that aids in the identification of biological organisms. Historically, the most common type of identification key is the dichotomous key , a type of single-access key which offers a fixed sequence of identification steps, each with ...

  7. Tree of life (biology) - Wikipedia

    en.wikipedia.org/wiki/Tree_of_life_(biology)

    Edward Hitchcock's fold-out paleontological chart in his 1840 Elementary Geology. Although tree-like diagrams have long been used to organise knowledge, and although branching diagrams known as claves ("keys") were omnipresent in eighteenth-century natural history, it appears that the earliest tree diagram of natural order was the 1801 "Arbre botanique" (Botanical Tree) of the French ...

  8. List of biology websites - Wikipedia

    en.wikipedia.org/wiki/List_of_biology_websites

    Bioinformatic Harvester - was a bioinformatic meta search engine at KIT Karlsruhe Institute of Technology—working for human, mouse, rat, zebrafish, drosophila and arabidopsis thaliana information Catalogue of Life - compiled with sectors provided by 52 taxonomic databases from around the world—planned to become a comprehensive catalogue of ...

  9. EMBiology - Wikipedia

    en.wikipedia.org/wiki/EMBiology

    EmBiology (formerly EMBiology) is a web-based Software as a service tool from Elsevier in which researchers can view biological relationships between entities, such as genes, proteins, and cells.