JAMB Biology 1986 Question 1

Question 1

Viruses, Monera, Protista and Fungi

Viruses are regarded as non-living because they

  1. A.can neither reproduce asexually nor sexually
  2. B.cannot survive in their respective environments
  3. C.do not possess characteristics that can be transmitted from one generation to the next
  4. D.can neither respire nor excrete.
Show the answer and explanation

Answer: D (can neither respire nor excrete.)

Explanation

Outside a host cell a virus carries out no life processes such as respiration or excretion; it can even be crystallised like a chemical.