D. Cones
Cycads are basically composed of woody plants which have roots, a stem, leaves and reproductive structures called Cones. These cones differ from each other depending on the plant whether it is female or male. These cones vary from shape, size, color, etc. based on the sex of the plant.
Automatically region nervous system
Adenosine triphosphate (ATP)
We would not be able to live without it! It sustains life as we know it!