A drafter, draftsperson, or draughtsman is a person who makes a drawing (technical or expressive). A professional drafter who makes technical drawings is sometimes called a drafting technician. Professional drafting is a desirable and necessary function in the design and manufacture of complex mechanical components and machines.
Introduction. Behavior is determined by a combination of inherited traits, experience, and the environment. Some behavior, called innate, comes from your genes, but other behavior is learned, either from interacting with the world or by being taught. Let's read about some pet behavior and try to figure out if it's learned or innate.
The innate immune response is not completely nonspecific, as was originally thought, but rather is able to discriminate between self and a variety of pathogens. The innate immune system recognizes microorganisms via a limited number of germline-encoded pattern-recognition receptors (PRRs). This is in contrast to the large repertoire of rearranged receptors utilized by the acquired system. PRRs possess common characteristics.