Question

Unicellular eukaryotes are grouped into
A. Fungi and protists
B. Fungi and Eubacteria
C. Only protists
D. Only Fungi
E. Fungi, protists and Eubacteria

Answer 1

Hint: This kingdom forms a link between kingdom Monera on one hand and on other hand the three kingdoms i.e., Plantae, Fungi and Animalia.

Complete answer:
Unicellular eukaryotes are grouped into ‘Only protists’, irrespective of their mode of nutrition. Because Fungi are multicellular eukaryotic organisms and Eubacteria are prokaryotic unicellular organisms.

Additional Information:
 General Characteristics of Protista:
-Unicellular, eukaryotic organisms. Some are colonial without much of the cellular differentiation. Tissue level organization is absent.
-Mostly aquatic in nature.
-Cell structure is eukaryotic and possesses all membrane bound cell organelles and 80 S cytoplasmic ribosomes. Cells may possess cell walls made up of cellulose.
-Flagella and cilia have a (9+2) pattern of microtubule organization consisting of tubulin protein.
-Movement occurs by pseudopodia, flagella or cilia.
-Mode of nutrition- photosynthetic (holophytic), holozoic, saprophytic or parasitic. Some also show a mixotrophic mode of nutrition, like as in Euglena, it shows photosynthetic and saprophytic nutrition.
-Reproduction takes place by both asexual and sexual means.
-Two types of life cycles are there in protists:
-Showing zygotic meiosis
-Showing gametic meiosis
-These organisms are decomposers, parasites or photosynthetic organisms. And the parasitic protists are responsible for causing diseases like dysentery, malaria, sleeping sickness, etc.
-The kingdom Protista includes:
Autotrophic or Photosynthetic organisms, Example: Dinoflagellates, Diatoms, Euglenoids
Consumer-Decomposer organisms, Example: Cellular slime moulds, Acellular slime moulds
Protozoans, Example: Zooflagellates, Sarcodines, Sporozoans, Ciliates
So, the correct answer is ‘Only Protists’.

Note: Protists are ancestors of all multicellular eukaryotes (plants, fungi and animals). And it is the connecting link between the kingdom Monera and kingdom Plantae, fungi and animalia.