Question

Which of the following is not haplo- diplontic-
(a) Polysiphonia
(b) Sphagnum
(c) Psilotum
(d) Chlamydomonas​

Answer 1

Option (D) Chlamydomonas is the correct answer.

• Polysiphonia is a green alga that has haplo diplontic life cycle.
• Sphagnum also shows the haplo diplontic life cycle.

• The Psilotum reproduces vegetatively as well as by spores so it also shows haplo diplontic life cycle.
• The life cycle in Chlamydomonas is haplontic as a dominant phase in the life cycle is haploid (n) and the diploid phase is represented only by the zygote.

Hence, option (D) is the correct answer.