Question

The giant algae or seaweeds belong to class
(A) Phaeophyceae
(B) Rhodophyceae
(C) Chlorophyceae
(D) Xanthophyceae

Answer 1

Hint: The seaweeds are the macroscopic, multi cellular organism that live in the marine water. They are similar to the algae and most of their species are autotrophic by preparing their own food but some of the sea weeds depend on the food materials that are externally available.

Complete Answer:
- Sea weeds can be arranged into three general gatherings depending on the pigmentation as the brown, red and green. Botanists classified these weeds to the general classes as Phaeophyceae, Rhodophyceae and Chlorophyceae, individually.
- Brown seaweeds are typically huge and run from the giant kelp i.e, frequently 20m long, to thick, leather like ocean growth from 2-4m long, to littler species 30-60cm long. Red ocean growth is typically smaller in nature, for the most part extending from a couple of centimeters to about a meter long.
- Red kelp is not generally red, they are at times purple, even tannish red, yet they are as yet grouped by botanists as Rhodophyceae, as a result of different qualities. Green kelp is likewise little, with a comparative size range to the red ocean growth.
- Ocean growth is additionally called as full-scale green growth. This recognizes them from miniature green growth (Cyanophyceae), which are tiny in size, frequently unicellular, and are most popular by the blue green growth, that occasionally sprout and sully waterways and streams. Hence the giant algae are belonging to the class Phaeophyceae.

Thus, the option (A) is correct.

Note: Remember that the seaweeds belonging to the class Phaeophyceae are called giant weeds and the weeds belonging to the rhodophyceae possess different qualities in them. The algae belong to the Chlorophyceae are smaller to all other type and are sometimes unicellular in nature.