Question

Match the column I and II.

Column I	Column II
(i) Chrysophyte	(a) Gonyaulax
(ii) Dinoflagellate	(b) Euglena
(iii) Euglenoids	(c) Diatom
(iv) Slime moulds	(d) Plasmodium

A. i-a, ii-c, iii-b, iv-d
B. i-a, ii-d, iii-b, iv-c
C. i-c, ii-b, iii-d, iv-a
D. i-c, ii-a, iii-b, iv-d

Answer 1

According to the five-kingdom classification, Kingdom Protista belongs to eukaryotes which are single-celled. Members of this kingdom are primarily aquatic. Chrysophytes, dinoflagellates, euglenoids, slime moulds, and protozoans belong to this kingdom.

Complete answer: Diatoms and golden algae or desmids fall under the category of chrysophytes. Freshwater and marine environments are their habitats. They are microscopic in size and the water current helps them to float passively. Chrysophytes are mainly photosynthetic. Two thin overlapping shells are formed by the cell walls in diatoms. Their walls are indestructible as they are formed of silica. The accumulation of a large amount of cell wall deposits is referred to as diatomaceous earth. Diatoms are considered to be the chief producers in the ocean. Depending on the main pigments present, dinoflagellates can be yellow, brown, green-blue, or red. They are marine and photosynthetic in nature. The outer surface of the cell wall is composed of cellulose plates. They have two flagella; one is present longitudinally and the other is present transversely in a furrow present between the wall plates. Gonyaulax is a red dinoflagellate that undergoes rapid multiplication and makes the sea appear red. Euglenoids have a flexible body due to the presence of a protein-rich layer called a pellicle. It is mainly present in stagnant water. They can either be photosynthetic or heterotrophic. Euglenoids have pigments which are identical to those present in higher plants. Euglena falls under this category.
Slime moulds or saprophytic protists engulf organic materials while moving along decaying twigs and leaves. An aggregation called Plasmodium is formed by slime moulds under favourable conditions. They can spread over several feet.
Thus, the correct option is D, i.e., i-c, ii-a, iii-b, iv-d.

Note: most organisms under the Kingdom Protista are aquatic while others live in damp areas. They may either be autotrophic or heterotrophic in nature.