The correct sequence of events in the life cycle of bryophytes is A. Fusion of antherozoid with egg.B. Attachment of gametophyte to substratum.C. Reduction division to produce haploid spores.D. Formation of sporophyte.E. Release of antherozoids into water.Choose the correct answer from the option givenbelow:

Answer

Life Cycle of Bryophytes: Sequence of Events

Bryophytes, such as mosses and liverworts, exhibit a clear alternation of generations, with the haploid gametophyte being the dominant phase. The following steps outline the correct sequence of events in the bryophyte life cycle:

Sequence of Events:

• B: Attachment of gametophyte to substratum – The gametophyte anchors to the surface using rhizoids for stability and nutrient absorption.
• E: Release of antherozoids into water – Male gametes (antherozoids) are released from antheridia into a film of water, a prerequisite for fertilization.
• A: Fusion of antherozoid with egg – Antherozoids swim to archegonia, where fertilization occurs, forming a diploid zygote.
• D: Formation of sporophyte – The zygote develops into a sporophyte, which remains attached to the gametophyte and is composed of a foot, seta, and capsule.
• C: Reduction division to produce haploid spores – Meiosis occurs in the capsule, producing haploid spores that can grow into new gametophytes.

Alternation of Generations

This sequence demonstrates the alternation of generations in bryophytes: the dominant gametophyte generation gives rise to a dependent sporophyte after fertilization. The sporophyte produces spores that regenerate the gametophyte, ensuring continuation of the life cycle and genetic diversity.