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Alternation of Generation

Which of the ...

Question

Which of the following statements is not true for bryophytes?

A

They lack vessels and sieve tubes

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B

They are photosynthetic

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C

Their zygote undergoes meiosis and then produces a sporophyte

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D

Their spores germinate to produce gametophytes

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Solution

The correct option is C
Their zygote undergoes meiosis and then produces a sporophyte

The zygote in bryophtes forms a sporophyte which undergoes meiosis to form spores.

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Q. A plant body first undergoes asexual reproduction by forming spore and then the spore develop into gametophytes which produce gametes. Later these gametes fuse to form zygote. The zygote once again develops into a sporophyte. In which subdivision can we find this type of alternation of generation?

Q. In pteridophytes
(a) Spores are always of two kinds
(b) Vascular tissues are present
(c) The sporophyte is parasitic over the photosynthetic gametophyte
(d) The development of zygotes into young embryos takes place within the female gametophytes

Q. A: The haploid plant body (gametophyte) produces gametes by mitosis
R: Diploid sporophytic plant body produces spores by meiosis

Q. Zygote of an organism developed after syngamy undergoes meiosis to form haploid spores, which divide mitotically and form the gametophyte. The organism must have ________ life cycle.

Q. Rearrange the following events starting from the formation of the zygote in Marchantia :
I. Formation of sporophyte
II. Spore germination
III. Formation of gametophyte
IV. Gamete formation
V. Reductional division
VI. Formation of spores
VII. Syngamy

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