Grade 12 Life Sciences

Grade 12 Life Sciences

4 Seasons

Grade 12 Life Sciences covers a range of biological concepts and processes and covers topics such as Meiosis, Reproduction in Vertebrates, Human Reproduction, Responding to the Environment (Humans), Human Endocrine System, Homeostasis in Humans, Responding to the Environment (Plants), Human Impact on Environment and DNA: Code of Life, Meiosis, Genetics and Inheritance, Evolution to prepare you for your final examinations.

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Grade 12 Life Sciences
  • The Endocrine system

    Episode 1

    In this lesson, we unpack the endocrine system and the different components that make this system able to achieve homeostasis.

  • Negative feedback mechanism

    Episode 2

    The endocrine system has a negative and positive feedback mechanism to help it achieve the balance of homeostasis. In this lesson, we look into how this type of regulation keeps the body in balance around the set body’s set points.

  • Homeostasis in humans

    Episode 3

    Homeostasis is about maintaining the internal environment of the body. This balance is achieved through a number of mechanisms and hormones. In this lesson, we look at all the ways in which homeostasis is achieved in the body.

  • Thermoregulation: Skin

    Episode 4

    The skin is the largest organ of the body and is therefore a key player in maintaining homeostasis. In this lesson, we look at homeostasis through thermoregulation and how the skin works with other structures to control our internal temperatures.

  • Hormones in plants

    Episode 5

    Plants have hormones that stimulate their processes of life. In this lesson, we take a detailed look at these hormones and their functions

  • Plant defence mechanism

    Episode 6

    In the lesson, we take an in-depth look at how plants protect themselves from the environment and predators. We unpack the range of adaptations these plants have as defence mechanisms.

  • Evolution

    Episode 7

    In this lesson, we look at the theory of evolution and the gradual change of species over time. We look at the evidence used to prove this theory: fossil records, anatomical evidence, biogeography, comparative embryology, and genetics.

  • Evolution by Natural Selection

    Episode 8

    In this lesson, we take an in-depth look at natural selection and the theories proposed by Charles Darwin and Jean-Baptiste Lamarck on how species have evolved.

  • Variation

    Episode 9

    In this lesson, we discuss variation and the DNA changes that occur on a cellular level to allow variation among species. We take an in-depth look at the types of variation that drive the theory of evolution.

  • Evolution by natural selection

    Episode 10

    In this lesson, we will look at the theory of punctuated equilibrium proposed by Niles Aldridge ad Stephen Gould. We also unpack the types of speciation and reproductive isolation.

  • Human Evolution

    Episode 11

  • The cradle of humankind

    Episode 12