pick out the ancestral line of cycads from the list given below

ferns

herbaceous lycopods

seed ferns

and horsetail

and also explain how???

Dear Student,

Cycads are the type of gymnosperm with palmate leaves and massive cones; cycads are most often found in the tropics. Various characteristics on the basis of which it was concluded that cycads are direct descendants of the seed ferns are:

The stems and vascular systems of seed ferns had certain ultrastructural features similar to those of cycads. In addition, the ultrastructure of the seed of seed ferns was similar to that of cycads. Thus, many botanists believe that the cycads are direct descendants of the seed ferns.

Hope this will help you,

All the best !!