Two factors contributed to the success of the pteridophytes: the extreme miniaturization of the gametophytic generation and an important development of the sporophytic generation (development of the tree forms).
Pteridophytes are a group of plants that peaked in the Carboniferous (-300 million years). It is the first great terrestrial plant civilization. These plants would have appeared in the Devonian -400 million years ago, perhaps from certain primitive terrestrial plants which, unlike bryophytes, would have favored the diploid generation on the haploid generation.
Particularly well adapted to terrestrial life, they have created, thanks to the development of tree forms, immense forests whose fossilization is at the origin of coal deposits.
Pteridophytes are at the origin of an evolutionary lineage based on the extreme miniaturization of gametophytic generation and an important development of sporophytic generation, leading to all tracheophytes including current flowering plants. Pteridophytes are well adapted to terrestrial life, however fertilization still requires the presence of water since male gametes are swimmers.
The
correct option from given options is "b".<span>
Monosaccharides are also known as Simple sugars.
Two main categories of sugars are monosaccharides and
disaccharides. Fructose, glucose, and ribose are included
in monosaccharides. Glucose is a kind of sugar in monosaccharides that is known
as the blood sugar.</span>
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Answer:
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Answer:
They absorb the food molecules that result from the external digestion.
Explanation:
