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List the Merits of Local Defence Systems. - Biology

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Question

List the merits of local defense systems.

Short Note

Solution

Merits of local defense systems:

  1. Local defence systems start working instantaneously.
  2. These systems are not dependent on previous exposure to infections.
  3. They are effective against a wide range of potentially infectious agents. 
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Chapter 17: Aids to Health - Short answer trype [Page 175]

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Selina Concise Biology [English] Class 9 ICSE
Chapter 17 Aids to Health
Short answer trype | Q 8 | Page 175
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