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Symmetry - Metazoa
All living organisms have some body shape and form. The general body plan of animals may be organized in one of several ways . Arrangement of parts or organs on either side of an imaginary dividing line or around a common axis or radially around a point so that opposite parts are mirror images of one another is called symmetry. There are two broad divisions of symmetry,
(i) Primary, or embryonic
(ii) Secondary, or adult.
Figure: Different types of body symmetries
The latter may or may not be the same as the primary one. For example, the larva of starfish is bilaterally symmetry but the adult starfish is radially symmetrical. The primary symmetry is bilateral and secondary symmetry is radial. With regard to symmetry animals can be basically of five types
Anther is the top of a stamen's filament; divided into pollen sacs in which the pollen grains are form.
basis of genetic transplantation
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What causes acid precipitation? Acid precipitation is the result of air pollutants that combine with water vapor in the atmosphereto form acids, causing precipitation that is m
What is meant by encystment
names and locatio
feature
Greater Palatine nerve and vessel The greater palatine nerve runs forward in a groove on the inferior surface of the hard palate to communicate with nasopalatine nerve in inci
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