Question

Complexity in body organisation is maximum in
'a'
and complex post-fertilization changes
are seen in
'b'
(1) a - Brown algae; b - Red algae
(2) a - Red algae; b - Red algae
(3) a - Green algae; b - Red algae
(4) a - Brown algae; b - Green algae​

Answer 1

Answer:

option 4) a - Brown algae; b - Green algae

Answer 2

Amongst algae, the red algae contain the most complex body organization along with complex post-fertilization changes

• Red algae which belong to Rhodophyceae, are called so due to the abundance of the presence of a red pigment r-phycoerythrin, inside them which imparts them with a red color.
• Some of them have a complex body organization with multicellular thalli, the main axis with branches, and frond.
• They also show complex post-fertilization changes after sexual reproduction, which is of the oogamous type.
• Some examples of red algae are Porphyra, Geliduim.

Thus, (Option 2)  a - Red algae; b - Red algae is the correct answer.