Seed habit first established in:-a)Pteridophytesb)Cycadofilicalesc)Ang...
Seed Habit first established in Gymnosperms
Gymnosperms are a group of vascular plants that produce seeds without any protective fruit or ovary. The word "gymnosperm" means "naked seed" in Greek, which refers to the fact that the seeds of these plants are not enclosed in a protective fruit. The seed habit was first established in gymnosperms, which are considered to be the first plants to produce seeds.
Gymnosperms are divided into four main groups: Cycadophyta, Ginkgophyta, Coniferophyta, and Gnetophyta. All of these groups produce seeds that are not enclosed in a fruit, and they have several other unique characteristics that set them apart from other plants.
Conifers are the most familiar group of gymnosperms, and they include trees such as pines, spruces, and firs. These trees produce seeds that are enclosed in a cone, which protects them from the environment. Cycads and ginkgoes are two other groups of gymnosperms that are often grown as ornamental plants.
The seed habit of gymnosperms was a major evolutionary innovation because it allowed plants to reproduce more efficiently and to colonize new habitats. Seeds are resistant to desiccation and can be dispersed over long distances, which allows plants to establish new populations in areas where they may not have been able to survive otherwise.
In conclusion, the seed habit was first established in gymnosperms, which are a group of plants that produce seeds without any protective fruit or ovary. This innovation allowed plants to reproduce more efficiently and to colonize new habitats. Gymnosperms are divided into four main groups, which include conifers, cycads, ginkgoes, and gnetophytes.
Seed habit first established in:-a)Pteridophytesb)Cycadofilicalesc)Ang...
The earliest seed plants, “progymnosperms”, emerged in the late Devonian .The seed replaces the spore of the seed-less fern plants as propagation, dispersal and deposit/outlast/storage unit.