SCIENCE
BOTANY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Cystocarp and Gametophyte
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Carposporophyte and Tetrasporophyte
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Gametophyte and Gonimoblast
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Cystocarp and Gonimoblast
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Detailed explanation-1: -A cystocarp is the fruiting structure produced in the red algae after fertilization, especially such a structure having a special protective envelope (as in Polysiphonia). The structure from which carpospores are released.
Detailed explanation-2: -The life-cycle of the red algae has three stages (triphasic). In Polysiphonia it consists of a sequence of a gametangial, carpospoangial and tetrasporangial phases.
Detailed explanation-3: -Ectocarpus and Polysiphonia exhibit haplo-diplontic life cycle.
Detailed explanation-4: -The carposporophyte or cystocarp or gonimocarp is made of many gonimoblast filaments attached on the placental cell which remain covered by Sterile pericarp. (Fig. 6 B-D). It is urn shaped structure.