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The underlying mechanisms responsible for elimination of three of the four meiotic products during microsporogenesis in sedges have remained obscure. Although programmed cell death (PCD) is known to be an integral part of plant development, several aspects, such as the enormous size difference between functional and eliminated cells, nuclear viability of the smaller cells targetted for elimination and the possible dangers of employing PCD-like mechanisms during gametophyte development point to a novel way of selective cell elimination associated with asymmetric division. This paper throws some light on the possible roles of cell plate dynamics and cell fate determinants in pseudomonad development. The rarity and significance of asymmetric division with morphogenetic consequences associated with meiosis are discussed in the context of generally prevalent, mitosis- associated asymmetric divisions during development.

In this paper, Genetic Algorithm (GA) is used for identifying two bioprocesses. Bioprocesses are highly nonlinear systems and hence conventional techniques such as Recursive Least Squares (RLS) cannot be used to identify these systems. Systems chosen for identification are fed batch fermentor and bioreactor. Simulation results are presented for the above cases and are found to be satisfactory.

In the normal fuzzy logic control (FLC) system, both the membership functions and the rule sets are usually decided upon subjectively, case by case. The application of Genetic Algorithm(GA) could lead to proper selection of membership functions and rule base objectively. In this paper, the optimisation of membership functions of a FLC for a fed-batch fermentor is carried out with help of Genetic Algorithm (GA). Results are found to be satisfactory.