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Regarding life cycle of plants and gametophyte : Match the following and choose the most appropriate option:

A. Haplontic life cycle 1. dominant,photosynthetic,independent
B. Diplontic life cycle 2. thalloid or erect phase
C. Haplo-diplontic life cycle - bryophyte 3. short- lived multicellular
D. Haplo-diplontic life cycle - pteridophyte 4. one-celled zygote
5. single to few-celled haploid gametophyte
6. saprophytic/autotrophic, independent
7. vascular plant body

( A ) A-5; B-7; C-1,4; D-2,3,6
( B ) A-1; B-5; C-1,2; D-3,6
( C ) A-5,6; B-1; C-1,2,4; D-3,6
( D ) A-1,6; B-5; C-1,2,3; D-6
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(B) is the right answer.

1. Haplontic life cycle : The dominant, photosynthetic phase in such plants is the free-living gametophyte. 2. Diplontic life cycle : The gametophytic phase is represented by the single to few-celled haploid gametophyte. 3. Haplo-diplontic life cycle : Bryophytes and pteridophytes exhibit an intermediate condition; both phases are multicellular.But they differ in their dominant phases. bryophytes : A dominant, independent, photosynthetic, thalloid or erect phase is represented by a haploid gametophyte pteridophytes : multicellular, saprophytic/autotrophic, independent but short-lived haploid gametophyte.
answered Apr 2, 2014 by pady_1

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