Question

Find out the incorrect sentence:

• 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 a well-defined nucleus

Answer 1

The correct option is D

Monerans have a well-defined nucleus

The correct option is D

Explanation of the correct option:

1. Kingdom Monera includes bacteria.
2. Bacteria are prokaryotes.
3. Prokaryotes lack well-defined nuclei.
4. Well-defined nuclei are present in eukaryotes.

Explanation of the incorrect option:

Option A:

1. Kingdom Protista includes unicellular eukaryotes.
2. Protista kingdom forms a link with the others dealing with plants, animals, and fungi
3. Being eukaryotes, the Protista contains a nucleus and organelles.
   

Option B:

1. R.H. Whittaker (1969) gave the five-kingdom classification
2. Monera, Protista, fungi, Plantae, and Animalia were the kingdoms formed.
3. Cell structure, body organization, mode of nutrition, reproduction, and phylogenetic relationships were the criteria for classification.

Option C:

1. Kingdom monera includes bacteria that are prokaryotes.
2. Monera consists of autotrophic (chemosynthetic and photosynthetic) and heterotrophic (saprophytic/parasitic).
3. Cyanobacteria have chlorophyll a.
4. Heterotrophic monera are Bacillus.
5. Kingdom Protista includes unicellular eukaryotes.
6. Protista consists of autotrophic (photosynthetic) and heterotrophic.
7. Heterotrophic protists are protozoans, and autotrophic are dinoflagellates.
   

Final answer: Monerans have a well-defined nucleus is an incorrect statement.