Biology 4BI1/1BR May June 2020

Edexcel IGCSE Biology (4BI1) Jun 2020

معلم موافق رایگان بودن است.

1. Plant Cell Structure and Adaptations: Differences between plant and animal cells, functions of cell structures, adaptations of palisade mesophyll cells for photosynthesis.

2. Genetic Engineering and Biotechnology: Role of plasmids in bacterial genetic modification, industrial fermenter conditions for insulin production, aseptic techniques in biotechnology.

3. Respiration and Circulatory System: Gas exchange in horses, function of pulmonary arteries, changes in blood flow during exercise, oxygen debt and increased respiration rate.

4. Food Webs and Population Dynamics: Construction of food webs, trophic levels, mouse population fluctuations, reasons for owl population stability, and methods for estimating animal populations.

5. Pregnancy and Nutrition: Function of the placenta, active transport in fetal cells, role of antibodies in immunity, karyotyping for fetal sex determination, dietary needs during pregnancy.

6. Environmental Science and Pollution: Effect of sulfur dioxide on lichen growth, methods for measuring air pollution impact, experimental investigation on sulfur dioxide effects on seed germination.