Hasil penelusuran data penelitian PISA menunjukkan bahwa posisi literasi sains siswa Indonesia masih berada di peringkat 10 terakhir dibandingkan negara lainnya. Hal tersebut menunjukkan kurangnya keterampilan peserta didik Indonesia menyelesaikan soal PISA. Penelitian ini bertujuan untuk menghasilkan menghasilkan instrumen asesmen berbasis literasi sains untuk materi keanekaragaman hayati kelas X yang valid, praktis, mempunyai tingkat kesukaran yang bervariasi, daya pembeda yang baik, dan reliabel. Jenis penelitian ini yaitu penelitian pengembangan (Research and Development) dengan model pengembangan 4-D. Subjek penelitian terdiri dari 36 orang peserta didik kelas X SMAN 3 Pariaman dan validator terdiri dari 3 orang dosen FMIPA UNP dan 1 orang guru SMAN 3 Pariaman. Penelitian ini menghasilkan instrumen asesmen berbasis literasi sains yang sangat valid secara logis (90,54%) dan valid secara empiris dengan korelasi rendah hingga tinggi (0,33-0,75) untuk soal pilihan ganda, cukup hingga tinggi (0,42-0,80) untuk uraian, majemuk dan sikap, sangat praktis digunakan oleh guru (93,88%) dan oleh peserta didik (92,31%), reliabilitas tinggi (0,69) untuk soal pilihan ganda dan reliabilitas sangat tinggi (0,86) untuk soal uraian, majemuk dan sikap, serta daya pembeda dan tingkat kesukaran yang bervariasi.

This study aims to determine the effect of the two stay two stray learning model based on a scientific approach to the competence of class XI students at SMAN 3 Pariaman. This type of research is a quasi-experimental research with a randomized control-group posttest only design. The research population was all class XI MIPA students at SMAN 3 Pariaman in the 2022/2023 academic year. Sampling used a purposive sampling technique, so that class XI MIPA 1 (experimental class) and class XI MIPA 3 (control class) were selected. Data analysis techniques using normality test, homogeneity test and hypothesis testing. Testing the hypothesis in the domain of knowledge uses the t test while testing the hypothesis in the domain of attitudes and skills using the Mann Whitney test. The results of the study found that the two stay two stray learning model based on a scientific approach had an effect on the competence in the realm of knowledge, attitudes and skills of class XI students at SMAN 3 Pariaman

Greening along roads can be an alternative solution to overcome air pollution in urban areas. Direct contact of plants with pollutant particles in the air will affect the condition of plants, especially on leaves. Knowledge of morphological characteristics and stomata on leaves that have the potential to absorb pollutants is the basis for understanding plant responses to environmental changes. This research is descriptive research conducted in September-December 2021 with leaf samples taken in the area of ​​PT Semen Padang, Padang State University, and Andalas University forests. Data were analyzed by t test level of 5%. The results showed that the morphological characteristics of trembesi leaves in the PT Semen Padang and Padang State University areas had significant differences in the aspects of the number of leaflets, leaf length, leaf width, not significantly different in the length of the mother petiole and the number of leaf branch bones and the characteristics of the stomata did not show any difference which is evident from the aspect of stomata length and stomata density. The morphological characteristics of trembesi leaves in the Padang State University and Andalas University forests showed significant differences in the length of the mother petiole, the number of leaflets, and the number of leaf veins, there was no significant difference in leaf length and leaf width and showed a significant difference in the aspect of stomata length, but did not show a significant difference in terms of stomata density. Morphological characteristics of trembesi leaves in the PT Semen Padang area and Andalas University forest showed significant differences in the length of the mother petiole, number of leaflets, leaf length, leaf width, and number of leaf veins and did not show significant differences in terms of stomata length and stomata density.