Lichen is a symbiotic organism consisting of algae (photobionts) and fungi (mycobiont). In Indonesia, Usnea is the only genus of lichen that has been widely recognized and used by the local community for traditional medicine. It is locally known as kayu angin, rusuk angin, or janggot Kai. Furthermore, it produces lichen acid and other compounds as secondary metabolites that need investigation. Therefore, this study aimed to identify species and determine the secondary metabolites of Usnea in West Java. There were 13 species of Usnea identified, with U. rubrotincta, U. mutabilis, and U. barbata being new to West Java. The extraction of U. esperantiana has the highest number of lichen acids, with 20 different types identified. This study showed that Usnea contains lichen acid, flavonoid, and saponin compounds. The secondary metabolites are a potential source of natural products for bioprospecting.

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During this covid-19 pandemic, Quizizz, as an Android-based educational game application, can be used to encourage students to be active and motivated in distance learning. This study aims to determine students' perceptions of the use of quizizz in motivating the students to study biology during online learning. The study population was all students of class IX MTs As-Saádah. The total number of respondents was 48 students. Data analysis was performed using the quantitative descriptive percentage technique. The research data was obtained by distributing questionnaires using the google form application. The questionnaire showed that 79.2% and 54.2% of students' perceptions regarding using the most preferred and good learning media were Quizizz. 45.8% of students showed interest in taking biology lessons using quizizz. 62.5% and 47.9% of students are motivated and enthusiastic about getting high scores. 89.6% and 66.7% of students agree that quizizz can improve their learning outcomes and concentration. 66.7% of students answered that the level of difficulty of quizizz questions was moderate, and 64.5% of students chose to agree that quizzz provided a new learning experience. The use of quizizz in online biology learning is a media recommendation that is appropriate, interesting and fun for students.

Tempe is prepared from soybean seed base through fermentation with yeast containing Rhizopus sp. The types of microorganisms in the growth of tempeh microflora are very diverse and have a role during fermentation and are very interesting to look at. The use of tempeh packaging produces compounds that cause tempeh to have a distinctive taste and aroma. The use of different wrappers in tempeh, it is likely that it can also affect the type of microorganisms that play a role at the time of fermentation.  This study aims to isolate the mold from tempeh craftsmen in Jatiasih, Pondok Gede.  The sample used was fresh tempeh wrapped in banana leaves and plastic from Jatiasih tempeh craftsman, Pondok Gede.The method used is direct plating on PDA media. Macroscopic observations were carried out by observing the color of conidia and mycelium, while microscopic observations were carried out with slide culture techniques, namely observing the shape of spora, columela, sporangiospora and hyphae.  The data are presented in the form of tables and figures and analyzed descriptively qualitatively. The results showed that in all samples of tempeh Jatiasih craftsmen predominantly contained molds suspected to be Rizhopus stolonifer  Keywords: Isolation, Rizhopus stolonifer; Tempeh, Wrap