Answer:
paracrine signaling.
Explanation:
Chemical signaling between cells is one of the most important ways that activities of tissues and organs are coordinated. The nervous system is the other major coordinating system in animals, but even here chemical signaling is used between adjacent neurons. The mechanisms involved are described as either being paracrine, autocrine, intracrine, endocrine, neuroendocrine or pheromones. Paracrine signals diffuse locally and act on neighboring cells.
1. In the configuration of the chicken wing, a connective tissue acts as an anchor. The connective tissue connects the muscle to the bone. This tissue is called the tendon.
2. The rile between muscles, tendons, bones, ligaments, cartilages and joints is that they all act simultaneously to make movement possible for a certain body. It may also be that they are not quite very distinguishable between each other, making one think that one is the other.
I think the correct answer is nucleic acid. There four major classes of macromolecules and these are lipids, carbohydrates, proteins and nucleic acids. Among these nucleic acid would best fit the definition. Examples of nucleic acids are DNA and RNA.