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  2. All India Secondary School Examination - Wikipedia

    en.wikipedia.org/wiki/All_India_Secondary_School...

    All India Secondary School Examination, commonly known as the class 10th board exam, is a centralized public examination that students in schools affiliated with the Central Board of Secondary Education, primarily in India but also in other Indian-patterned schools affiliated to the CBSE across the world, taken at the end of class 10. The board ...

  3. Determination of sex - Wikipedia

    en.wikipedia.org/wiki/Determination_of_sex

    Determination of sex is a process by which scientists and medical professionals determine the biological sex of a person or other animal using genetics and biological sexual traits.

  4. Index of branches of science - Wikipedia

    en.wikipedia.org/wiki/Index_of_branches_of_science

    Catechectics – art of teaching by question and answer. [citation needed] [relevant?] Celestial mechanics – Branch of astronomy – study of motion of objects in outer space. Cell biology – Branch of biology that studies cells – study of the different structures and functions of both eukaryote and prokaryote cells.

  5. List of unsolved problems in biology - Wikipedia

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

    Developmental psychobiology posed this question since the lack of knowledge about the precise coordination of all cells, even those not related anatomically, in space and time during the embryonic period does not allow us to understand what forces at the cellular level coordinate four very general classes of tissue deformation, namely: tissue ...

  6. Evolutionary pressure - Wikipedia

    en.wikipedia.org/wiki/Evolutionary_pressure

    It is a quantitative description of the amount of change occurring in processes investigated by evolutionary biology, but the formal concept is often extended to other areas of research. In population genetics, selective pressure is usually expressed as a selection coefficient.

  7. Biological process - Wikipedia

    en.wikipedia.org/wiki/Biological_process

    Biological processes are those processes that are necessary for an organism to live and that shape its capacities for interacting with its environment. Biological processes are made of many chemical reactions or other events that are involved in the persistence and transformation of life forms.

  8. Hydra (genus) - Wikipedia

    en.wikipedia.org/wiki/Hydra_(genus)

    Hydra (/ ˈ h aɪ d r ə / HY-drə) is a genus of small freshwater hydrozoans of the phylum Cnidaria.They are native to the temperate and tropical regions. [2] [3] The genus was named by Linnaeus in 1758 after the Hydra, which was the many-headed beast of myth defeated by Heracles, as when the animal has a part severed, it will regenerate much like the mythical hydra's heads.

  9. Cutaneous respiration - Wikipedia

    en.wikipedia.org/wiki/Cutaneous_respiration

    Cutaneous respiration, or cutaneous gas exchange (sometimes called skin breathing), [1] is a form of respiration in which gas exchange occurs across the skin or outer integument of an organism rather than gills or lungs.