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Shapes of viruses
Viruses occur in a wide variety of shapes. Some are spherical or polyhedral . Some are helical appearing cylindrical or rod-like and other are complex. Viruses are usually classified on the basis of their hosts, as for example, animal viruses (infecting animal cells), plant viruses (infecting plant cells) and bacteriophages (infecting bacterial cells).
Figure: Different shapes in viruses: (a) Spherical; (b) Helical, and (c) Complex
Into which subphyla are the protochordates divided? What are some representatives of each protochordate subphylum? Urochordates (or tunicates) and cephalochordates are the two
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why phloem made of living cells
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