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In a constantly changing environment, animals are forced to make crucial behavioral choices for survival. Food determines whether wild animals evolve, whether populations decline, or how ecological groups are structured. Animals have the ability to adapt their nutritional needs according to the availability of food, they detect and assimilate nutrients. Drosophila melanogaster, the fruit fly, is considered an important model for various studies. For example, in nutrition research and for understanding the mechanisms of human disease. In this study, we have provided an overview of fruit fly feeding behavior, how diet influences mating behavior and what volatiles attract flies. We show that mating behavior is very closely related to food and that egg laying is influenced by yeast, a very important source of protein. [ABSTRACT FROM AUTHOR]

Bombyx mori is one of the most studied species of Lepidoptera by the scientific community, being a permanent model organism especially for life sciences. Two major proteins named fibroin and sericin are found in silk thread used in the cocoon. Fibroin is widely used as a biomaterial due to the high biocompatibility, mechanical strength and biodegradability. Besides the great economic importance, over the past decade, Bombyx mori has received major attention as a bioreactor for large scale production of recombinant proteins. One of the greatest advantages of silkworms is the number of genes which are homologous to human genes, but also it is important to mention their short generation time and the rich genetic resource. In this article, we summarized a review of using the transgenic silkworm as a bioreactor to produce recombinant proteins. The recombinant proteins are currently used to optimize the biomaterials, which have a significant impact for the progress of human and veterinary medicine. For example, sericin hydrogels, containing human acidic fibroblast growth factor supporting wound healing, have been developed. Also, to improve cell adhesive properties, silk fibroin/hyaluronic scaffolds for human mesenchymal stem cell culture have been produced. [ABSTRACT FROM AUTHOR]