how to tell a drone bee from a worker bee
Drone (bee) A drone is characterized by eyes that are twice the size of those of worker bees and queens, and a body size greater than that of worker bees, though usually smaller than the queen bee. His abdomen is stouter than the abdomen of workers or queen. Although heavy bodied, the drone must be able to fly fast enough to accompany the queen in flight.
Vein Veins are less muscular than arteries and are often closer to the skin. There are valves in most veins to prevent backflow.
Seed Seeds are the product of the ripened ovule, after fertilization by pollen and some growth within the mother plant. The embryo is developed from the zygote and the seed coat from the integuments of the ovule.
Stockholm Water Prize 2006: Professor Asit K. Biswas, The Third World Center for Water Management