Question

Some characters of algae are given below:
a. Floridean starch
b. Sulphated phycocolloids in cell wall
c. Alginic acid
d. Trumpet hypha
e. Haplodiplontic life cycle
f. Isomorphic alternation of generation
g. Fucoxanthin
h. Phycoerythrin
i. Zygotic meiosis
j. Two anterior flagella
Which of the given set of characters belongs to Laminaria?

• A. a, b, e, f, h
• B. c, d, e, g
• C. b, c, d, e, f, g, i
• D. c, d, e, f, g, i

Answer 1

The correct option is D c, d, e, f, g, i

D. c, d, e, f, g, i

Solution : Since Laminaria is a brown algae, it has alginic acid (a hydrophilic polysaccharide) in the cell wall. Trumpet hypha also in the members of family Laminariaceae. Laminaria also expresses a haplo-diplontic life cycle in which it alternates from a macroscopic stage called sporophyte to a microscopic stage called gametophyte. Zygotic meiosis and isomorphic alteration of generation is also observed in Laminaria. The pigments present are chlorophyll a, chlorophyll c and fucoxanthin.

So the correct answer is "c, d, e, f, g, i".