Biology 4BI1/2B May June 2020

Edexcel IGCSE Biology (4BI1) Nov 2020

معلم موافق رایگان بودن است.

1. Parasitic Infections and Disease Control: Schistosomiasis life cycle, infection process through contaminated water, diagnosis via eggs in urine, praziquantel treatment, and vaccine development using plasmids.

2. Blood Clotting and Genetic Engineering: Importance of clotting, enzyme involvement, cloning transgenic mammals for clotting protein production, and methods of treating clotting disorders.

3. Nervous System and Genetic Disorders: Huntington’s disease inheritance, dominant allele probability, pedigree analysis, and drug mechanisms for reducing nerve cell damage.

4. Photosynthesis and Experimental Biology: Effect of light color on photosynthesis, control of abiotic factors, evaluation of experiment accuracy, and alternative methods for measuring photosynthesis rate.

5. Reproductive System and Hormonal Regulation: Hormones involved in the menstrual cycle, ovulation estimation, factors affecting fertility, and reasons for reduced reproductive success.

6. Plant Transport Systems and Water Loss: Adaptations of root hair cells for absorption, water transport in xylem, measuring transpiration rate, and impact of environmental factors on water loss.