Match the columns.

Colum-A (Class)

Column-B (Common name)

i.

Chlorophyceae 

a.

Brown algae

ii.

Phaeophyceae

b.

Green algae

iii.

Rhodophyceae 

c.

Blue-green algae

iv.

Cyanophyceae

d.

Red algae

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SSC CGL 2023 Tier-I Official Paper (Held On: 14 Jul 2023 Shift 1)
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  1. i - b, ii - c, iii - a, iv - d
  2. i - b, ii - a, iii - d, iv - c
  3. i - d, ii - c, iii - b, iv - a
  4. i - a, ii - b, iii - c, iv - d

Answer (Detailed Solution Below)

Option 2 : i - b, ii - a, iii - d, iv - c
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Detailed Solution

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The correct answer is i - b, ii - a, iii - d, iv - c. Key Points

  • Chlorophyceae:-
    • It is a class of green algae, distinguished mainly on the basis of ultrastructural morphology.
    • They are usually green due to the dominance of pigments chlorophyll a and chlorophyll b.
    • The chloroplast may be discoid, plate-like, reticulate, cup-shaped, spiral- or ribbon-shaped in different species.
    • Most of the members have one or more storage bodies called pyrenoids located in the chloroplast.
    • Pyrenoids contain protein besides starch. Some green algae may store food in the form of oil droplets.
  • Phaeophyceae:-
    • It also known as brown algae, is a class of multicellular algae that are found primarily in marine environments.
    • They are distinguished by their brown color, which is due to the presence of the pigment fucoxanthin.
    • Brown algae range in size from microscopic filaments to giant kelp forests that can reach over 60 meters in length.
  • Cyanophyceae:-
    • It is known as Cyanobacteria, is a class of prokaryotic organisms that obtain energy via photosynthesis.
    • It is known as Blue-green algae.
    • They are considered to be the oldest form of life on Earth, with fossils dating back over 3.5 billion years.
    • Cyanobacteria are found in a wide variety of habitats, including freshwater, marine, and terrestrial environments.
  • Rhodophyceae:-
    • It also known as red algae, is a class of eukaryotic algae that are found primarily in marine environments.
    • They are distinguished by their red color, which is due to the presence of the pigment phycoerythrin.
    • Red algae range in size from microscopic filaments to large, complex seaweeds.
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