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Life Cycle of Gymnosperms

Gymnosperm, a...

Question

Gymnosperm, and angiosperm is diplontic in life cycle.Then why Gametophyte is dominant phase in gymnosperm

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Solution

No, Sporophyte is the dominant in pteridophytes, gymnosperms and angiosperms. Gametophyte is dependent. So the life cycle is diplontic.

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Q. I. In Rhodophyceae, food is stored as mannitol and laminarin. II. Ovules of gymnosperms are not enclosed by ovary wall. III. Salvinia is heterosporous. IV. In diplontic life cycle, free living gametophyte represents dominant phase. Of the above statements.

Q. Assertion :In diplontic life cycle, gametophyte is dominant. Reason: In diplontic life cycle, there is no free living sporophyte.

Q. In gymnosperms, dominant phase is ______________

Q. Match the columns I and II and choose the correct combination from the options given: Column I Column II

a. Haplontic life cycle	i. Gymnosperms and angiosperms
b. Diplontic life cycle	ii. Spirogyra
c. Haplo-diplontic life cycle	iii. Bryophytes and pteridophytes

Q. Diplontic type of life cycle is seen in

(i)

(i i)

(i i i)

(i v)

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Life Cycle of Gymnosperms

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