EVERYDAY SCIENCE

SCIENCE

PLANT KINGDOM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
While most of the algal species are haplontic, which among the following is haplo-diplontic?
A
Fucus
B
Chara
C
Polysiphonia
D
Spirogyra
Explanation: 

Detailed explanation-1: -While most algal genera are haplontic, some of them such as Ectocarpus, Polysiphonia, and Kelps are haplo-diplontic. Fucus is diplontic.

Detailed explanation-2: -Ectocarpus and Polysiphonia exhibit haplo diplontic life cycle.

Detailed explanation-3: -Polysiphonia is a red algae with haplo diplontic life cycle and Fucus is a brown alga with diplontic life cycle.

Detailed explanation-4: -Algae such as Ectocarpus, Polysiphonia and Kelp are haplo-diplontic.

Detailed explanation-5: -Examples for haplontic life cycle: Green algae, e.g. Volvox, Spirogyra, Chlamydomonas, etc. Diplontic Life Cycle – The diploid sporophyte is the dominant stage. It shows gametic meiosis. Examples for diplontic life cycle: Brown algae Fucus, Gymnosperms, Angiosperms, etc.

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