Skeleton is what the connective tissue uses to stay part of the body. Without the skeletal system we wouldn't be able to move our muscles.
Its defensive, warning coloration is bright colors. Such as poisonous dart frogs, they are brightly colored in order to warn predators they are poisonous
The answer to this question is the "coal-burning power or the power plants". Hence, the Airborne mercury has received special attention because it is a widespread and persistent neurotoxin. TA neurotoxin is a substance that damages the brain and the nervous systems. Minute doses can cause nerve damage and other impairments, especially in the young children and the developing fetuses. The majority of the airborne mercury is released by POWER PLANTS or coal-burning plants. Many people are affected and get sick that is why when there is a proposed new power plant project, most people object and opposed.
Complex organisms need cells that can perform many different functions. they need to be supported on a cellular level. Without specialized cells you they won't be able to perform different functions.
