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  2. Test (biology) - Wikipedia

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

    In biology, a test is the hard shell of some spherical marine animals and protists, notably sea urchins and microorganisms such as testate foraminiferans, radiolarians, and testate amoebae. The term is also applied to the covering of scale insects. The related Latin term testa is used for the hard seed coat of plant seeds.

  3. Test cross - Wikipedia

    en.wikipedia.org/wiki/Test_cross

    In such a test cross, if the individual being tested is heterozygous, a phenotypic ratio of 1:1:1:1 is typically observed. [7] To test Mendel’s idea, he performed complex crosses with plants that were purebred for two characteristics: seed color (yellow and green), seed shape (round and wrinkled).

  4. Three-point flexural test - Wikipedia

    en.wikipedia.org/wiki/Three-point_flexural_test

    The three-point bending flexural test provides values for the modulus of elasticity in bending, flexural stress, flexural strain and the flexural stress–strain response of the material. This test is performed on a universal testing machine (tensile testing machine or tensile tester) with a three-point or four-point bend fixture.

  5. Pearson's chi-squared test - Wikipedia

    en.wikipedia.org/wiki/Pearson's_chi-squared_test

    Pearson's chi-squared test or Pearson's test is a statistical test applied to sets of categorical data to evaluate how likely it is that any observed difference between the sets arose by chance. It is the most widely used of many chi-squared tests (e.g., Yates , likelihood ratio , portmanteau test in time series , etc.) – statistical ...

  6. The Theory of Island Biogeography - Wikipedia

    en.wikipedia.org/wiki/The_Theory_of_Island...

    The Princeton University Press reprinted the book in 2001 as a part of the "Princeton Landmarks in Biology" series. [1] The book popularized the theory that insular biota maintain a dynamic equilibrium between immigration and extinction rates. The book also popularized the concepts and terminology of r/K selection theory. [2]

  7. State of Texas Assessments of Academic Readiness - Wikipedia

    en.wikipedia.org/wiki/State_of_Texas_Assessments...

    The test formats are relatively the same compared to the TAKS test in 3-8 grade, however in 9-11th grade end of course tests will be taken to supplement the normal tests taken while the TAKS was still in effect. The STAAR end-of-course assessments are, in their respective order: English I, II; Algebra I; Biology; U.S. History

  8. Two-point discrimination - Wikipedia

    en.wikipedia.org/wiki/Two-point_discrimination

    Two-point discrimination (2PD) is the ability to discern that two nearby objects touching the skin are truly two distinct points, not one.It is often tested with two sharp points during a neurological examination [1]: 632 [2]: 71 and is assumed to reflect how finely innervated an area of skin is.

  9. Molecular Biology of the Cell (book) - Wikipedia

    en.wikipedia.org/wiki/Molecular_Biology_of_the...

    Molecular Biology of the Cell has been described as "the most influential cell biology textbook of its time". [2] The sixth edition is dedicated to the memory of co-author Julian Lewis, who died in early 2014. The book was the first to position cell biology as a central discipline for biology and medicine, and immediately became a landmark ...