What is the one most obvious difference between the gymnosperms and angiosperms?

a. the gymnosperms don't produce seeds while the angiosperms do.

b. the gymnosperms have bark while the angiosperms don't.

c. the gymnosperms don't have leaves while the angiosperms do.

d. the gymnosperms are tall while the angiosperms are short.

e. the gymnosperms don't form flowers while the angiosperms do?

The answer is E

The gymnosperms don't form flowers while the angiosperms do. Gymnosperms are woody trees with cone like appearance. They bear no flowers, no fruits but bear seeds. The seeds are naked as they are not covered by the fruit wall. Gymnosperms produce naked seeds (a seed not enclosed in an ovary). In Angiosperms, the flowers are the reproductive organs and they may be both unisexual and bisexual. Angiosperms employ double fertilization resulting in a diploid (2n) zygote, and a triploid (3n) endosperm.