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  2. List of unsolved problems in biology - Wikipedia

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

    Unsolved problems relating to the structure and function of non-human organs, processes and biomolecules include: Korarchaeota (archaea). The metabolic processes of this phylum of archaea are so far unclear. Glycogen body.

  3. Last universal common ancestor - Wikipedia

    en.wikipedia.org/wiki/Last_universal_common_ancestor

    The first universal common ancestor (FUCA) is a hypothetical non-cellular ancestor to LUCA and other now-extinct sister lineages. The genesis of viruses, before or after the LUCA as well as the diversity of extant viruses and their hosts are subjects of investigation.

  4. Tree of life (biology) - Wikipedia

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

    Tree of life (biology) The tree of life or universal tree of life is a metaphor, conceptual model, and research tool used to explore the evolution of life and describe the relationships between organisms, both living and extinct, as described in a famous passage in Charles Darwin 's On the Origin of Species (1859). [1]

  5. 100 animal trivia questions that will make you think - AOL

    www.aol.com/news/100-animal-trivia-questions...

    Test your knowledge on all things zoology with these animal trivia questions about cats, dogs, fish, zoo animals and insects perfect for kids and adults.

  6. Phenylthiocarbamide - Wikipedia

    en.wikipedia.org/wiki/Phenylthiocarbamide

    Phenylthiocarbamide ( PTC ), also known as phenylthiourea ( PTU ), is an organosulfur thiourea containing a phenyl ring. It has the unusual property that it either tastes very bitter or is virtually tasteless, depending on the genetic makeup of the taster.

  7. Sex-determining region Y protein - Wikipedia

    en.wikipedia.org/wiki/Sex-determining_region_y...

    In humans, the SRY gene is located on short (p) arm of the Y chromosome at position 11.2. Sex-determining region Y protein (SRY), or testis-determining factor (TDF), is a DNA-binding protein (also known as gene-regulatory protein/transcription factor) encoded by the SRY gene that is responsible for the initiation of male sex determination in therian mammals (placental mammals and marsupials).

  8. Reciprocal altruism in humans - Wikipedia

    en.wikipedia.org/wiki/Reciprocal_altruism_in_humans

    In evolutionary biology, altruism is an individual behavior that benefits another individual's fitness but reduces their own fitness in population. The concept of ″altruism″ in biology arose from the debate of ″the Problem of Altruism″ in Natural Selection.

  9. Index of branches of science - Wikipedia

    en.wikipedia.org/wiki/Index_of_branches_of_science

    Modern science is typically divided into three major branches that consist of the natural sciences ( biology, chemistry, physics, astronomy and Earth science ), which study nature in the broadest sense; the social sciences (e.g. psychology, sociology, economics, history) which study people and societies; and the formal sciences (e.g ...

  10. 0 - Wikipedia

    en.wikipedia.org/wiki/0

    Biology. In comparative zoology and cognitive science, recognition that some animals display awareness of the concept of zero leads to the conclusion that the capability for numerical abstraction arose early in the evolution of species. Dating systems

  11. 3. Mathematics addresses only a part of human experience. Much of human experience does not fall under science or mathematics but under the philosophy of value, including ethics, aesthetics, and political philosophy. To assert that the world can be explained via mathematics amounts to an act of faith. 4.