What is the main difference among seedless plants, gymnosperms, and angiosperms? their vascular tissue their ecosystem adaptations their leaf arrangements their reproductive structures

Reproductive structures

Explanation:

Gymnosperms have seeds unprotected by an ovary or fruit

Angiosperms have flowers that reproduce seeds enclosed in the carpel

Seedless plants are obviously seedless

Hope this helps ^-^

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.