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Question

Most plants exhibit alternation of generation during their life cycle. Which reproductive cells form the sporophytic and gametophytic plant body respectively?
  1. Haploid spores, diploid gametes
  2. Fusion of two haploid gametes, haploid spores
  3. Diploid spores, diploid gametes
  4. Haploid spores, fusion of two haploid gametes

A
Diploid spores, diploid gametes
B
Haploid spores, fusion of two haploid gametes
C
Haploid spores, diploid gametes
D
Fusion of two haploid gametes, haploid spores
Solution
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Most plants exhibit alternation of generations in their life cycle. These plants have a diploid sporophytic phase that produces the haploid spores which form the gametophyte. This haploid gametophyte produces haploid gametes which then fuse to form the diploid sporophyte and that further develops into a plant.
Thus, the correct answer is option B.

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A: The haploid plant body (gametophyte) produces gametes by mitosis
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