1. how pteriodophytes shows seed habitat?

2.what is strobilli or cone?

Some Pteridophytes possess some of the characteristics needed for seed formation like retention of the female gametophyte within the megasporangium on the parent plant for proper parental care of new embryo and the development of the zygote inside the female gametophyte which are the precursors of the seed habit.

Strobili is a reproductive structure present on many land plant species consisting of sporangia that bears spores. Strobili are often called cone. Strobili are characterized by a central axis (anatomically a stem) surrounded by spirally arranged structures that may be modified leaves or modified stems. 

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