Question

Common ancestor of seed ferns and progymnosperms are

Answer 1

${\huge {\mathfrak {Answer :-}}}$

✨$<b>Progymnosperm. </b>$

➡️ The progymnosperms are an extinct group of woody, spore-bearing plants that is presumed to have evolved from the trimerophytes, and eventually gave rise to the gymnosperms.

➡️ They have been treated formally at the rank of division Progymnospermophyta or class Progymnospermopsida (as opposite).

That's it...

Answer 2

Psilophyton are the common ancestor of peogymnosperms and ferns. For reference see class 12 biology ncert fig 7.9.

Mark as brainliest.