Grade 11 Life Science Lessons

Video Description
Lesson 1: Viruses and Bacteria
In this lesson on Viruses and Bacteria we focus on the following: Basic structure and general characteristics, diseases, medical biotechnology as well as the ecological role and economical use of Bacteria.
Lesson 2: Fungi and Protists
In this lesson on Fungi and Protists we consider their basic struture and general characteristics as well as economical use and diseases.
Lesson 3: Plant Diversity
In this lesson on Plant Diversity we take a look at Bryophytes, Pteridiophytes, Gymnosperms and Angiosperms.
Lesson 4: Animal Diversity
In this lesson on Animal Diversity we focus on Phylum Porifera, Phylum Cnidaria, Phylum Platyhelminthes, Phylum Annelida, Phylum Arthropoda as well as Phylum Chordata.
Lesson 5: Photosynthesis
In this lesson on Photosynthesis we look at the process of photosynthesis using words and symbols. We look at the importance of photosynthesis. We discuss the effects of variable amounts of light, carbon dioxide and temperature on the rate of photosynthesis. We look at the role of carbon dioxide enrichment, optimum light and optimum temperatures in greenhouse systems to improve crops. Finally, we consider the role of ATP as an important energy carrier in the cell.
Lesson 6: Human Nutrition
In this lesson on Human Nutrition we look at the differences in dentition between herbivores, carnivores and omnivores. We identify the macro-structure of alimentary canal and associated organs and the functions of the different parts. We consider the processes of ingestion, digestion, absorption, assimilation and egestion.
Lesson 7: Diet and Malnutrition
In this lesson on Diet and Malnutrition we look at homeostatic control of blood sugar levels. We consider the relationship between food intake, energy, growth and health. We consider the importance of a balanced diet and changing requirements due to age, gender and activity levels.
Lesson 8: Cellular Respiration
In this lesson on Cellular Respiration we define cellular respiration. We look at the role of glycolysis, Kreb's cycle and oxidative phosphorylation in aerobic respiration. We define anaerobic respiration. We consider alcoholic fermentation and lactic acid fermentation in muscles. We look at the role of anaerobic respiration in industry. Finally, we compare aerobic respiration and anaerobic respiration.
Lesson 9: Gaseous Exchange
In this lesson on Gaseous Exchange we define gaseous exchange, look at the requirements for efficient exchange as well as study gaseous exchange in the various organisms. Finally, we look at gaseous exchange in humans.
Lesson 10: Excretion
In this lesson on Excretion we take a look at the different organs responsible for excretion in the human body. We also focus on the structure of the urinary system and the kidney as well as discuss the disorders of the kidney.
Lesson 11: Population Ecology
In this lesson on Population Ecology we look at factors that determine population growth. Additionally, we consider methods used to determine population size.
Lesson 12: Human Impact on the Environment I
In this lesson on Human Impact on the Environment I we identify the effect human activities have on the atmosphere. We discuss the consequences of human activity including deforestation, desertification and global warming. Finally, we explain the effect human activities have on the supply of water.
Lesson 13: Human Impact on the Environment II
In this lesson on Human Impact on the Environment II we explain the effect of human activities on the quality of water. We identify the impact of solid waste disposal on the environment. We discuss the factors that affect food security. Finally, we identify the loss of biodiversity due to human activities.
Lesson 14: Exam Questions Paper 1
In this lesson we work through various exam questions from Paper 1.
Lesson 15: Exam Questions Paper 2
In this lesson we work through various exam questions from Paper 2.