first-year of growth (actual diameter of about 3 mm). rows of large pink cells in the centre - these are the xylem cells that make-up the wood. the xylem is the bark (stem cortex) and inside the xylem is the pith (stem medulla). traversed by rays of parenchyma cells, like radial spokes (stained green).
verity noun. âº [U] the âquality of being âtrue: In the âfilm, he âplays a âspy whose âmission is to âconfirm the verity of a âsecret âmilitary âdocument. âº [C] a âbelief, âidea, or âprinciple that is âgenerally âaccepted as being âtrue: She has âspent her âlife in a âsearch for âeternal/âscientific/âuniversal verities.
Reliability and Validity. Reliability and validity, as the terms are used in scientific study, are characteristics of the dependent variable and the specific operational definition. In analyzing a study, after the dependent variables and their operational definitions are identified, their reliability and validity must be established.