theory of epigenesis -it was propounded by c f
THEORY OF EPIGENESIS -
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manipulating collectionswithin plsql the collections add procedural power and flexibility the biggest benefit is that your program can compute
some varray examplesin sql plus assume that you define an object type project as described belowsqlgt create type project as object 2 projectno
manipulating individual elementsfaraway you have manipulated an entire collection within the sql to manipulate the individual elements of the
manipulating local collectionswithin plsql to manipulate the local collection by using the table and cast operators the operands of cast are a
theory of epigenesis -it was propounded by c f wolff and supported by von baeraccording to it the egg contains the substances which are required in
baers law -it was given by ke von baer von baer was the first scientist who studied the embryology systematicallyaccording to it in the embryonic
germ plasm theory -it was proposed by weismannaccording to it two types of cells are formed during embryonic development viz - germ cell amp somatic
mosaic thoery -it was given by w rouxhe studied the development of frogs egg he destroyed one cells by a hot needle out of 2-cells formed as a result
regulative theoryit was propounded by hens drieschhe performed experiments on the eggs of sea urchin similar to the experiments performed by rouxhe
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