Q. Top-shaped multiciliate male gametes and the mature seed which bears only one embryo with two cotyledons, are characteristic features of :
A) polypetalous angiosperms
B) gamopetalous angiosperms
C) conifers
D) cycads
Explanation
[Solution from source] Cycads have large, top-shaped male gametes with many cilia, which is a primitive trait. Their seed carries one embryo with two cotyledons. Angiosperms and conifers have non-motile male gametes delivered by a pollen tube. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.