Class IX

One of most common essential component of many co-enzymes is
  1. Vitamin D12
  2. Vitamin K
  3. Vitamin E
  4. Vitamin B complex
Over-breathing can be countered through
  1. in breath longer than out breath
  2. out breath longer than in breath
  3. excessive breathing
  4. holding breath
If male and female flowers are borne on different plants, plant is called
  1. bisexual
  2. dioecious
  3. unisexual
  4. trisexual
Viruses attacking bacterial cells are
  1. bacterioplasts
  2. bacteriocytes
  3. bacteriophages
  4. saprophytes
Outside host cells, viruses do not
  1. replicate
  2. feed
  3. respire
  4. all of these
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