Plantar warts commonly found on the bottom of the foot are caused by a virus and can cause irritation. Athlete's foot, which is caused by a fungus, also can lead to foot irritation. A common cause of foot pain is the ingrown toenail.
The adaptive defense consists of antibodies and lymphocytes, often called the humoral response and the cell mediated response. The term âadaptiveâ refers to the differentiation of self from non-self, and the tailoring of the response to the particular foreign invader.he adaptive defense consists of antibodies and lymphocytes, often called the humoral response and the cell mediated response. The term âadaptiveâ refers to the differentiation of self from non-self, and the tailoring of the response to the particular foreign invader.
The functional definition allows us to identify adaptive traits, while the historical definition allows us to identify adaptations. Adaptive traits are those that increase the fitness of an organism [in a given environment]. Adaptations are adaptive traits that got selected for and remained. To understand the difference: vestigial organs are adaptations, but they are no longer adaptive. In other words, they were adaptive at one point and got selected for, therefore they are adaptations.