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Viruses. no metabolism not alive can not be killed ... The symptoms from a viral infection occur when the virus is in a lytic state. steps: attachment- ... biosynthesis- phage DNA directs synthesis of viral components by host cell ... Viral DNA destroys Cell DNA, takes over cell functions and destroys the cell.
The outer coverings that are tough but, flexible provided protection to the land plants.
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Mutations in DNA
An offspring receives half of its genetic material from its mother and half from its father.
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The Earth's movement through space affects life on Earth
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