Question: 93: Which of the following is incorrectly matched?
(1) Porphyra – Floridian Starch
(2) Volvox – Starch
(3) Ectocarpus – Fucoxanthin
(4) Ulothrix – Mannitol
Answer: Option (4)
Explanation:
Algae are classified into different groups based on pigments and reserve food materials.
Porphyra belongs to Rhodophyceae, and the reserve food material in red algae is Floridian starch,
so option (1) is correctly matched.
Volvox is a green alga belonging to Chlorophyceae, and green algae store food in the form of starch,
so option (2) is correctly matched.
Ectocarpus belongs to Phaeophyceae, which contains the pigment fucoxanthin responsible for its brown colour, so option (3) is correctly matched.
Ulothrix is a green alga of Chlorophyceae, and its reserve food material is starch, not mannitol.
Mannitol is stored in brown algae.
Therefore, Ulothrix – Mannitol is incorrectly matched,
making option (4) the correct answer.