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All Journal Bioscientist : Jurnal Ilmiah Biologi
Andayani, Anindya Aulya
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology Social Sciences

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Efektivitas Model Pembelajaran Problem Based Learning Terhadap Literasi Sains Siswa Pada Materi Klasifikasi Makhluk Hidup Kelas VII SMP Andayani, Anindya Aulya; Agustina, Lina
Bioscientist : Jurnal Ilmiah Biologi Vol. 13 No. 1 (2025): March
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v13i1.14909

Abstract

This study aims to analyze the effectiveness of the Problem-Based Learning (PBL) model in improving students’ scientific literacy. The research method used is pre-experimental with a one-group pretest-posttest design. The research sample consists of 32 seventh-grade students from class VII F, selected using purposive sampling techniques. Data collection techniques include a scientific literacy test conducted at the beginning and end of the study, supplemented by interviews with biology teachers regarding the implementation of the Problem-Based Learning model. The results of the study indicate a significant improvement in students’ scientific literacy after the implementation of the PBL model. The average pretest score of 64.72 (categorized as Moderate) increased to 83.25 (categorized as Very High) in the posttest. The distribution of scientific literacy improvement shows that 31.25% of students experienced a high increase, 59.38% a moderate increase, and 9.38% a low increase. These findings suggest that PBL enhances students’ understanding of scientific concepts, particularly in problem-solving and scientific data analysis. Thus, it can be concluded that Problem-Based Learning (PBL) is an effective teaching method for improving students’ scientific literacy.
Comparison of the Growth and Development of Green Spinach (Amaranthus hybridus L.) under Soil Conditions from the Java and Kalimantan Regions Shafira, Riannisa'a; Hastuari, Fitria Alfiyah; Andayani, Anindya Aulya; Role, Rofina Mbale; Indrowati, Meti
Bioscientist : Jurnal Ilmiah Biologi Vol. 14 No. 1 (2026): March
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v14i1.19533

Abstract

This study aimed to compare the growth of green spinach (Amaranthus hybridus L.) cultivated in two different soil types originating from Java and Kalimantan, and to examine the effect of soil pH on plant height. The experiment was conducted over a 21-day period (3–24 November 2025) using a comparative experimental design with a total of eight samples, consisting of four plants in each treatment group. The parameters observed included soil pH, plant height, number of leaves, leaf width, and leaf color. Environmental variables—such as light intensity, water volume, pot size, and seed quantity—were controlled to ensure consistent experimental conditions. The data were analyzed using statistical assumption tests, including the Shapiro–Wilk normality test and Levene’s homogeneity test, followed by linear regression analysis and analysis of covariance (ANCOVA). The results indicated that the data were normally distributed (p = 0.328) and homogeneous (p = 0.575). Regression analysis showed that soil pH had a significant effect on plant height (p = 0.026), whereas soil type did not have a significant effect after controlling for soil pH (ANCOVA, p = 0.089). The mean difference in plant height between soils from Java and Kalimantan was 2.90 cm; however, this difference was not statistically significant. These findings suggest that the growth of green spinach—particularly plant height—is more strongly influenced by environmental factors, especially soil pH, than by differences in soil origin.
Co-Authors Hastuari, Fitria Alfiyah Lina Agustina Meti Indrowati Role, Rofina Mbale Shafira, Riannisa'a