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  2. Motility - Wikipedia

    en.wikipedia.org/wiki/Motility

    Motile marine animals are commonly called free-swimming, [10] [11] [12] and motile non-parasitic organisms are called free-living. [13] Motility includes an organism's ability to move food through its digestive tract. There are two types of intestinal motility – peristalsis and segmentation. [14]

  3. The Sixth Extinction: An Unnatural History - Wikipedia

    en.wikipedia.org/wiki/The_Sixth_Extinction:_An...

    The Sixth Extinction: An Unnatural History is a 2014 nonfiction book written by Elizabeth Kolbert and published by Henry Holt and Company.The book argues that the Earth is in the midst of a modern, man-made, sixth extinction.

  4. Sperm motility - Wikipedia

    en.wikipedia.org/wiki/Sperm_motility

    Sperm motility is dependent on several metabolic pathways and regulatory mechanisms. The axonemal bend movement is based on the active sliding of axonemal doublet microtubules by the molecular motor dynein, which is divided into an outer and an inner arm. Outer and inner arm plays different roles in the production and regulation of flagellar motility: the outer arm increase the bea

  5. Twitching motility - Wikipedia

    en.wikipedia.org/wiki/Twitching_motility

    Twitching motility is a form of crawling bacterial motility used to move over surfaces. Twitching is mediated by the activity of hair-like filaments called type IV pili which extend from the cell's exterior, bind to surrounding solid substrates, and retract, pulling the cell forwards in a manner similar to the action of a grappling hook.

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  7. Life table - Wikipedia

    en.wikipedia.org/wiki/Life_table

    Life table" primarily refers to period life tables, as cohort life tables can only be constructed using data up to the current point, and distant projections for future mortality. Life tables can be constructed using projections of future mortality rates, but more often they are a snapshot of age-specific mortality rates in the recent past, and ...

  8. Actuarial notation - Wikipedia

    en.wikipedia.org/wiki/Actuarial_notation

    A life table (or a mortality table) is a mathematical construction that shows the number of people alive (based on the assumptions used to build the table) at a given age. In addition to the number of lives remaining at each age, a mortality table typically provides various probabilities associated with the development of these values.

  9. Late-life mortality deceleration - Wikipedia

    en.wikipedia.org/wiki/Late-life_mortality...

    In gerontology, late-life mortality deceleration is the disputed theory that hazard rate increases at a decreasing rate in late life rather than increasing exponentially as in the Gompertz law. Late-life mortality deceleration is a well-established phenomenon in insects, [ 1 ] which often spend much of their lives in a constant hazard rate ...