Pteridophytes don't have seeds. They propagate by spores. · Gymnosperms are the earliest seed plants. Gymnosperms have advanced reproductive structures compared to pteridophytes. Gymnosperms produce seeds as well. Gymnosperms are the most advanced. Option D is the correct answer
Thallophyta- body not differentiated into roots and stem,no vascular system,no seed formation
Bryophyta- body differentiated but lack vascular system,no seed formation
Pteridophyta- well- differentiated body, vascular system present, no seeds formation
Gymnosperms- well-differentiated body with vascular system, seeds are naked(not enclosed in a fruit)
Angiosperms- well-differentiated body with vascular system, seeds are covered(enclosed in a fruit)
There is an explanation video available below.
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