Question

Phycoerythrin is present in
(a)Polysiphonia
(b)Fucus
(c)Chlamydomonas
(d)Euglena

Answer 1

Hint: Phycoerythrin is a red photosynthetic pigment complex from the phycobiliprotein family, present in red algae and some cyanobacteria.They have been located in Europe, Australia, North America, Greenland, and South Africa.

Complete answer:
Polysiphonia is a genus of red algae and is usually well-branched, with some plants reaching a length of about 30 cm and are attached to a rocky surface or another alga by rhizoids or haptera.
Additional information:
-Polysiphonia derives its name from the polysiphonous nature of its thallus which consists of branched filaments each of which has a central axial filament supporting pericentral cells.
- The central siphon is surrounded by 4–24 pericentral siphons used in identification. For instance, Polysiphonia elongata shows cortical cells growing outside on the older fronds and a central axial cell with 4 preaxial cells.
-Life-cycle of the Polysiphonia (red algae) is three stages (triphasic) and they are gametangial, carpospoangial, and tetrasporangial phases. Male plants produce spermatia and the female plants produce the carpogonium remaining attached to the parent female plant.
-Fertilization occurs after a series of fusions zygote is formed. This zygote develops become carposporophyte, carpospores is non-motile when released; they settle and grow to form filamentous plants. This plant produces spores in fours after meiosis which settle and grow to become the male and female plants.
So, the correct answer is ‘Polysiphonia’.

Note: Fucus (rockweeds) belongs to a group of brown algae and is found in the intertidal zones of rocky seashores, Chlamydomonas belongs to a group of green algae and is found in stagnant water, on damp soil, in freshwater, and even in snow, and Euglena belongs to a group of the protozoan.