Which of the following statements is true?
Answer: (C) All pteridophytes exhibit haplo-diplontic pattern. Answer: (C) All pteridophytes exhibit haplo-diplontic pattern.
- A.Most algal genera are diplontic
- B.Most bryophytes do not have haplo-diplontic life cycle
- C.All pteridophytes exhibit haplo-diplontic pattern✓
- D.Seed bearing plants follow haplontic pattern
Correct Answer
(C) All pteridophytes exhibit haplo-diplontic pattern
Solution & Explanation
Answer: (C) All pteridophytes exhibit haplo-diplontic pattern. Solution: In pteridophytes both the multicellular diploid sporophyte and the multicellular haploid gametophyte (prothallus) are independent and free-living, which defines the haplo-diplontic life cycle; hence option C is true. Most algal genera are haplontic (not diplontic), bryophytes are haplo-diplontic (so the statement that they do not have it is false), and seed-bearing plants follow the diplontic (not haplontic) pattern. NCERT Reference: Class XI Biology, Plant Kingdom (Plant Life Cycles & Alternation of Generations — content rationalised from current reprint, grounded in pre-2023 NCERT text). The current reprint retains the supporting facts that pteridophytes have an independent free-living sporophyte and a free-living prothallus gametophyte at p.32, lines 12-13 ("Zygote thereafter produces a multicellular well-differentiated sporophyte which is the dominant phase of the pteridophytes") and p.31-32 ("free-living, mostly photosynthetic thalloid gametophytes called prothallus").