Question

Question 18 Which of the following statements is true of archegonia? They may temporarily contain sporophyte embryos. They are the sites where male gametes are produced. They are the same as antheridia. O They are the ancestral versions of animal gonads. They are asexual reproductive structures.

Answer 1

1)option A is the correct answer.Archegonium is the female sex organ containing the ovum or the female gamete.Many seeds have a cellular megagametophyte with two archegonia,each showing evidence of a multicellular embryo.They contain a multicellular structure or organ of the gametophyte phase of certain plants.They are the female sex organ in non-flowering plants.Plants may have more than one archegonium.They are the sites where female gametes are produced,not male gametes.The male sex organ is antheridium in which male gametes are produced.They are like antheridium in function,but not same as them.They are sexually reproducing structures in non flowering plants,not asexual reproductive structures.They are not considered as the ancestor of animal gonads.

2)option E ,Early bryophytes is the correct answer.Charophytes are the extant group of green algae that are most closely related to modern land plants.Comparitive analysis of gene sequences of charophytes together with sequences from bryophytes,pteridophytes and higher plants,and they confirm a common ancestory of charophytes and land plants.These data suggests that charales diverged early into a seperate lineage,whereas other orders within the charophytes shows close affinities to early bryophytes.They have the dna closer to land plants than other green algae.Land plants and charophytes shared a common ancestor.All other groups are also emerged from them ,but genetically more similar with bryophytes.