Explore structured biology courses, solved problems, simulations and Python activities.
Meristematic tissues that keep growing, and the permanent tissues made from them. The simple tissues: parenchyma, collenchyma and sclerenchyma. The complex tissues: xylem and phloem.
The epidermal, ground and vascular tissue systems. Then the inner structure of a dicot and a monocot root, stem and leaf, and what tells them apart under the microscope.
How a stem and a root grow thicker. The vascular cambium and the cork cambium, annual rings, heartwood and sapwood, and the bark and lenticels of a tree.
The tap root and fibrous root systems and the changes in roots for food, support and breathing. The stem and its modifications, and the leaf, its veins, its kinds and its modifications.
How flowers are arranged on a plant, and the parts of a flower. Then aestivation, placentation, the kinds of fruit, and the structure of dicot and monocot seeds.
How a botanist describes a plant in a standard way, with a floral diagram and a floral formula. Then three families: Fabaceae, Solanaceae and Liliaceae.
What an enzyme is, the active site and the lowering of activation energy. Then how temperature, pH, substrate and inhibitors change the rate, the six classes of enzyme, and cofactors, coenzymes and prosthetic groups.
How a tissue is analysed for its elements and compounds, and the primary and secondary metabolites. Then the four classes of biomacromolecule, amino acids and the four levels of protein structure, and sugars, polysaccharides and lipids.
Nucleotides and the structure of DNA and RNA, and the bonds that join each kind of monomer. Then metabolism as anabolic and catabolic pathways, ATP, and the living state as a steady state that is not equilibrium.
What a cell is, the cell theory and who built it, an overview of cells and their sizes and shapes, and the prokaryotic cell with its envelope, mesosomes, ribosomes and inclusion bodies.
The fluid mosaic model of the cell membrane and how things cross it, the plant cell wall, and the endomembrane system: endoplasmic reticulum, Golgi apparatus, lysosomes and vacuoles.
The organelles outside the endomembrane system: mitochondria, plastids, ribosomes, the cytoskeleton, cilia and flagella, centrosome and centrioles, microbodies, and the nucleus with its chromosomes.
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Beyond the textbook: how proteins fold and why shape means function, and Michaelis-Menten kinetics with the Lineweaver-Burk plot. Then competitive and non-competitive inhibition by numbers, and how pathways are controlled by feedback, with a full timed paper.
The plant groups side by side, with their key examples, economic uses and the tricky points that exams test, worked step by step, and a full NEET-style mock exam.
Two kinds of bacteria can differ from each other as much as a bacterium differs from you. How do biologists know? In this course we read three ideas that the main chapter only touches: the three domains of life, how bacteria are stained, grown and counted in a laboratory, and how a virus takes over a cell. Then we solve harder problems at the level of NEET, AP Biology and A-Level Biology, and take a timed test.
A horse and a donkey can have a young one, the mule, and the mule cannot have young. So are the horse and the donkey one species or two? In this course we read three ideas that the main chapter only touches: what a species really is, the finer rules that give each species one name, and how a key and a DNA barcode find a name. Then we solve harder problems at the level of NEET, AP Biology and A-Level Biology, and take a timed test.