Suppose you accidentally find an old preserved permanent slide without a label. In your effort to identify it, you place the slide under microscope and observe the following features :-
Unicellular
Well defined nucleus
Biflagellate–one flagellum lying longitudinally and the other transversely.
What would you identify it as? Can you name the kingdom it belongs to?
Answer
Dinoflagellates are unicellular eukaryotes. Most of them have two flagella; one lies longitudinally and the other transversely in a furrow between the wall plates. Dinoflagellates belongs to kingdom protista.
Fungi are known to grow well in moist, dark and warm places so, they can be commonly seen in any habitat where organic matter and moisture are available.
Viroid is a free RNA; it lacks the protein coat that is found in viruses, hence the name viroid. The RNA of the viroid is of low molecular weight. Viroids are smaller than virus.
Acellular slime moulds are consumer-decomposer protists which have a diploid somatic phase represented by Plasmodium, cellulose covered spores for dispersal and haploid swarm cells or myxoamoebae for sexual reproduction.
Nucleus is membrane bound structure located in centre of enkaryotic cell while necleoid is a membraneless structure found in prokaryotic cell (false nuleus).