Question

Stored food of phaeophyceae is?
A. Starch
B. Floridian starch
C. Laminarin and Mannitol
D. Glycogen

Answer 1

Hint: Algae are a chlorophyll bearing organism, which contain simple thalloid such as structure and autotrophic in the method of nutrition. The algae are divided into three major classes like chlorophyceae, Rhodophyceae, and phaeophyceae.

Complete step-by-step answer:
Algae reside primarily aquatic organisms which may reside both in marine water and freshwater.
PhaeophyceaeThe members of Phaeophyceae are commonly known as brown algae. They are found mostly in marine environments. The food is stored as complex carbohydrates, which may be in the type of mannitol or laminarin. Most of brown algae are aquatic organisms. They can be frond-like, filamentous, or giant kelps. The thallus of brown algae contains a stalk-like structure, a leaf-like photosynthetic part, and a holdfast. Example: Fucus, Sargassum, Laminaria, Dictyota, Ectocarpus.

RhodophyceaeThe members of Rhodophyceae are commonly known as red algae. The food is stored as Floridian starch which is very same as glycogen and amylopectin in shape. Example: Gelidium, Gracilaria, Porphyra, Polysiphonia.

Chlorophyceae:The members of Chlorophyceae are commonly known as green algae. The food is stored in pyrenoids storage bodies situated in the chloroplasts, which comprises starch. They are photosynthetic plant-like organisms. They contain chlorophyll a and b. They also include beta carotene. The structure of chloroplasts differs among green algae species. Spirogyra has a coil-shaped chloroplast at the same time Chlamydomonas has a cup-shaped big chloroplast. Eg. Spirogyra, Ulothrix, Volvox, and Chlamydomonas.

Hence the correct answer is Laminarin and Mannitol.




Note: Algae are thalloid, chlorophyll-bearing, simple, autotrophic and generally aquatic vegetation. They are found in wet stones, soils, and wood or in combination with animals and fungi.