Assertion (A): All plants with dominant haploid phase exhibit haplo-diplontic pattern of life cycle.
Reason (R): Haplo-diplontic life cycle is found in bryophytes

Assertion is incorrect. The haplodiplontic life cycle, also known as alternation of generations, is a type of life cycle found in many plants and algae. It involves alternating between a haploid (n) phase and a diploid (2n) phase. In plants with a dominant haploid phase, the haploid gametophyte is the more visible and independent stage, while the diploid sporophyte is usually smaller and more dependent on the gametophyte.

However, not all plants with a dominant haploid phase exhibit a haplodiplontic life cycle. For example, some green algae have a haplodiplobiontic life cycle, in which the haploid and diploid phases are similar in size and complexity.

The reason (R) is correct because bryophytes, which include mosses, liverworts, and hornworts, have a haplodiplontic life cycle. In bryophytes, the dominant phase is the haploid gametophyte, which produces gametes by mitosis. Fertilization of the gametes results in a diploid zygote, which develops into a sporophyte that remains attached to and dependent on the gametophyte. The sporophyte produces haploid spores by meiosis, which germinate into new gametophytes, completing the life cycle.

Therefore, the correct answer is (A) is incorrect, but (R) is correct.