These false nuts are really the seed-bearing, hard, inner layer (endocarp) of a fruit called a drupe. In dry drupes the outer layer or husk sometimes splits open or withers. This outer husk is part of the ovary wall (pericarp), and the hard inner wall surrounding the seed represents the inner part of the pericarp.n chestnuts (Castanea) and beech (Fagus) the involucre is spiny, while in filberts and hazelnuts (Corylus), the involucre is leafy or tubular, depending on the exact species. This is a simplified classification of dry fruit types that follows most general botany textbooks and plant identification manuals.
A feedback loop is a common and powerful tool when designing a control system. Feedback loops take the system output into consideration, which enables the system to adjust its performance to meet a desired output response.
What is feedback? It is a process that is the result of mutual causal interaction: X affects Y and Y affects X. The mutual causal interaction creates a circuit of effects, so that any change in X, causing a change in Y, in turn causes another change in X, and so on â a feedback loop.Feedbacks are either positive or negative.hat is what happens with feedbacks in an ecosystem as well, it is all about the combination of feedbacks. Learn more about how feedbacks work, about positive feedbacks in natural systems, and the relation between feedback and system stability. Ecological networks.