They are organized structures of dna
Answer:
Tiered pricing is a method where sellers segment the pricing of their products or services to suit their various target markets. By optimizing and changing up your offering between each of the segments, you appeal to a wider (and more varied) customer base as you provide for different demand rates and price points.
Arteries are blood carrying vessels which have thick, elastic, muscular walls, have no valves and in which blood flows under high pressure. The make up of arteries is unique to their function of transporting blood under high pressure.
All arteries carry oxygenated blood from the heart to all other parts of the body, with the exception of the pulmonary artery which carries de-oxygenated blood from the heart to the lungs. It is the only artery that transports blood which has not been oxygenated.
b
I am not that sure but I think endocrine cell don't contain blood vessels
