Find out incorrect sentence

Options

A. Protista includes unicellular eukaryotic organisms
B. Whittaker considered cell structure, mode and source of nutrition for classifying the organisms in five kingdoms
C. Both Monera and Protista may be autotrophic and heterotrophic
D. Monerans have well defined nucleus

Answer

D

Explanation

Kingdom-Monera comprises of single celled prokaryotic bacteria, filamentous actinomycetes and photosynthetic blue green algae. Since, they are prokaryotic therefore they do not have membrane bound cell organelles and a well defined nucleus. The undefined nuclear region is termed as nucleoid.
The organisms of kingdom-Protista are unicellular and eukaryotic organisms such as unicellular algae, protozans and unicellular fungi. Some of these organisms have appendages, such as cilia (e.g. Paramecium) and flagella (e.g., Euglena). Some of them are autotrophic (synthesise their own food) like unicellular algae while others are heterotrophic (depends on other for food) like protozoans. The heterotrophic members may be saprophytic (living on dead matter) or parasitic (living on other organisms).
Robert H Whittaker (1959) proposed the five kingdom classification considering cell structure, mode and source of nutrition.
The five kingdoms he proposed are
1. Kingdom-Monera 2. Kingdom-Protista ltbr 3. Kingdom-Fungi 4. Kingdom-Plantae
5. Kingdom-Animalia
Both Monera and Protista may be either autotrophic or heterotrophic in nature.