Question

Find out incorrect sentence
A. Protista includes unicellular eukaryotic organism
B. Whittaker considered cell structure mode and source of nutrition for classifying organisms in five kingdoms.
C. Both monera and Protista may be autotrophic and heterotrophic
D. Monera have well defined nuclei.

Answer 1

There are two types of organisms prokaryotic and eukaryotic where Eukaryotes are with well defined nucleus and prokaryotes does not have well defined Nucleus.

Complete answer:
Whittaker classification was given on the basis of specific criteria. Whittaker gave 5 kingdoms named as-
Monera (prokaryotic bacteria and blue green algae)
Protista (unicellular eukaryotic protozoan’s fungi and algae)
Fungi (multinucleate higher fungi)
Plantae (multicellular green plants and advanced algae)
Animalia (multicellular animals)
He proposed this on the basis of essential criteria and that is cell structure, mode of nutrition, body Organization, reproduction and phylogenetic relationship.
The kingdoms Protista and monera:-
-Protista are unicellular and eukaryotic organisms
They may be autotrophic or heterotrophic in nature.The cell organelles in protists are present as membrane bound and it is surrounded by plasmalemma, nucleus and nucleoplasm.
They are diatoms, algae, amoeba, molds and protozoans. The movement in these organisms is by cilia Flagella and pseudopodia.
-Monera are unicellular and prokaryotic organisms like bacterias, filamentous actinomycetes and photosynthetic blue green algae.
Cell organelles like mitochondria, lysosomes, plastids and Archaebacteria Golgi bodies all are absent in the moneras. They consist of Archaebacteria, bacteria and cyanobacteria in the classification. Also mycoplasma. They do not have well defined nuclei. They may be heterotrophic or autotrophic.
Hence the correct answer is (D).

Note: The monera is prokaryotic and Protista is eukaryotic and by definition Prokaryotic does not have well defined nucleus and does not have cell organelle. Both of these organisms are hetero trophic or autotrohic in nature. The classification proposed by Whittaker is essentially based on cell structure, mode of nutrition and body organization.