Question

Choose the incorrect statement from the following about the fertilisation in bryophytes:

• A. Isogamous fertilisation happens in bryophytes
• B. Antherozoid and egg are haploid
• C. The embryo forms the sporophytes and is diploid
• D. The sporophyte is dependent on the gametophyte and produces spores

Answer 1

The correct option is A Isogamous fertilisation happens in bryophytes

Gametophytes of bryophytes form antheridium (male sex organ) and archegonium (archegonium).

Antheridium produces haploid motile male gametes known as antherozoids. Antherozoids are comma-shaped and biflagellated.

Archegonium produces haploid non-motile egg. As the male and female gametes which form the zygote are different, fusion is anisogamous (Oogamous).

In bryophytes, the organisms have haplo-diplontic life cycle. The main plant body is multicellular and haploid (gametophyte). Gametophytes produce haploid gametes. The fusion of gametes forms the zygote. The zygote is diploid and divides by mitosis to form the embryo. The embryo forms the sporophyte which is, also, diploid. The sporophyte is attached and dependent for nutrition on the female gametophyte. The sporophyte produces the spores by meiosis. The spores are haploid.