It seems that you have missed the necessary options for us to answer this question so I had to look for it. Anyway, here is the answer. Varicose veins seen in the superficial veins of the legs are unsightly and often treated by surgically removing them. however, even without these veins being present, the return of all blood toward the heart from the legs is not diminished primarily because <span>blood can still return via the deep veins. Hope this helps.</span>
It attracts insects which in turns aid pollination.
Plant cells have walls that arent very flexible, so a plate forms in between the cells, and the cell splits in half.
Answer:
they can fly , which requires alot of energy & keep their body warm with their feathers
