1 The primary cause of COPD is tobacco smoke (through tobacco use or second-hand smoke).  The disease now affects men and women almost equally, due in part to increased tobacco use among women in high-income countries.
Swarming is the process by which a new honey bee colony is formed when the queen bee leaves the colony with a large group of worker bees. In the prime swarm, about 60% of the worker bees leave the original hive location with the old queen. This swarm can contain thousands to tens of thousands of bees.
most bumble bee stings occur when their nest is disturbed yes the worker bees and queen bee in a bumble bee colony are capable of stinging bumble bee colonies are organized around a queen bee who can also sting drones male bees and worker bees worker bees are sterile females and are able to sting because the ovipositor has evolved into a stinger