Which of the following are valid pointers to the demerits of the two kingdom classification proposed by Linnaeus?
I. Euglena has features both of plants and animals.
II. Chlamydomanas is autotrophic but has flagella.
III. Slime molds resemble animals in one phase of their life cycle and plants in the other phase.
(1) I and II only
(2) I and III only
(3) II and III only
(4) I, II and III
(4) Certain organisms like slime molds and Euglena have characters similar to plants and animals. Slime molds are tiny plants without cell walls whereas Euglena is minute animals with green pigment system. Their position in the living world was, hence, uncertain.