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Regarding life cycle of plants and sporophyte : 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 3. short- lived multicellular
4. one-celled zygote
5. totally or partially dependent on the gametophyte
6. vascular plant body
7. no free-living form

( A ) A-4,7; B-1; C-1,3,5,6
( B ) A-1; B-4; C-2,3,5,7
( C ) A-1; B-4,7; C-3,5
( D ) A-4,7; B-1; C-2,3,5,7

1 Answer

(A) is the right answer.

1. haplontic life cycle : Sporophytic generation is represented only by the one-celled zygote. There are no free-living sporophytes. 2.diplontic life cycle : the diploid sporophyte is the dominant, photosynthetic, independent phase of the plant. 3. Haplo-diplontic life cycle : Bryophytes and pteridophytes exhibit an intermediate condition; both phases are multicellular.But they differ in their dominant phases. bryophytes: short- lived multicelluler sporophyte totally or partially dependent on the gametophyte for its anchorage and nutrition. pteridophytes : diploid sporophyte is represented by a dominant, independent, photosynthetic, vascular plant body
answered Apr 2, 2014 by pady_1

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