Biology 4BI1/1B November 2021

Edexcel IGCSE Biology (4BI1) Nov 2021

معلم موافق رایگان بودن است.

1. Food Testing and Microorganisms: Starch test in bread using iodine solution, identifying fungal growth on bread, enzyme activity in starch digestion, and interpreting nutrient absorption data.

2. Blood Composition and Disorders: Red and white blood cell counts, effects of anaemia on oxygen transport, immune function and leukopenia, standard form calculations in biological data.

3. Digestive System and Enzymes: Role of stomach microorganisms in cellulose digestion in cows, enzyme activity in digestion, and hormonal regulation of milk production in dairy farming.

4. Nutrition and Growth: Role of vitamins in human health, impact of vitamin C on yeast growth, experimental setup for yeast growth studies, and control of variables in biological investigations.

5. Genetics and Inheritance: Dominant and recessive allele identification, genetic crosses in mice hair color, test crosses for genotype determination, and polygenic inheritance of traits.

6. Reproduction and Hormones: Comparison of asexual and sexual reproduction, female reproductive system functions, hormonal regulation in pregnancy, and sperm production analysis across different age groups.