pls someone answer this question
what feature of bryophytes do we admire the most that we want to transfer it to pterodophtya ???
with reason
plss help as earliest
Answers
In bryophytes and pteridophytes, transport of male gametes requires water. The male gametes , produced by reproductive structures called antheridia, are free-swimming sperm cells that need water to transport them to the female gametes, which are enclosed within structures called archegonia. Because of the need for water, bryophytes are especially common in wet habitats such as bogs, streambanks, and in moist forests. However, they are not restricted to these habitats, and some mosses thrive in deserts, above the treeline, and in the Arctic tundra.
Answer:
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What are Bryophytes?
Bryophytes are plants that are found growing in moist and shady places. Something unique about these plants is that they can survive on bare rocks and soil. They play an important role in plant succession on bare rocks. They show alternation of generations and have a unique nickname. So they are called the amphibians of the plant kingdom. Though they grow in a terrestrial environment, they are dependent on water for the reproduction process.
Unique features of Bryophytes
Bryophytes
(Source: Wikipedia)
Though not as complex as other plants, bryophytes live in humid and shaded places. But, they can be also found in arid forests, rainforests, apart from the alpine habitats. They are widely distributed throughout the world. You can see them growing on varied surfaces like rocks, soil, tree trunks, bones, rotting wood etc.
The tissue organization is not complex. But, they do display some amount of diversity. Some bryophytes maybe just over a millimetre long and some are a meter long too. They contain chlorophyll and can synthesize food through the process of photosynthesis. The plant body is slightly differentiated, though they do not have true roots, stems, and leaves. They generally have something similar to roots called the rhizoids. The main body of the bryophytes is more thallus like and haploid.
Bryophytes
Life Cycle of Moss ( Source – Encyclopedia Britannica)
Bryophytes are spore-producing plants that do not have a vascular tissue. They reproduce through gametes and hence have earned the name gametophytes. The sex organs of bryophytes are multicellular. Anthredium is the male sex organs while the female sex organ is called archegonium. The archegonium is a flask-shaped organ and produces a single egg. The anthredium produces antherozoids, which have two flagella.
When the antherozoids are released into the water and when they come in contact with the archegonium, a fusion of the gametes occurs and a zygote is produced. The zygote remains in the archegonium for some time. It then undergoes many cell divisions that are mitotic in nature and produces an embryonic sporophyte. This growing embryo is covered by a protective structure, called the calyptra.
The sporophyte is dependent on the gametophyte for the nutrients and the gametophore for water and minerals. The cells of the sporophytes undergo meiosis and give spores that are haploid. When these germinate, they produce the gametophyte.
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