SPM Biology blog, Page 6
Practical articles on studying SPM Biology, revision methods, exam technique, tricky topics explained, and answers to the questions students and parents ask most.
How the Heart Pumps Blood, Explained
A plain-language walkthrough of how the heart pumps blood, four chambers, valves, the cardiac cycle, and why the two sides work differently.
Chapter explainersHow the Kidney Makes Urine, Explained
A plain-language walkthrough of urine formation, filtering the blood, reabsorbing what the body needs, and what is left over as urine.
Chapter explainersUnderstanding Food Tests in Biology
A plain-language overview of the standard SPM food tests, starch, reducing sugar, protein and lipid, reagents, results and memory tips.
Chapter explainersHow Vaccines Work (Explained Simply)
How vaccines work at SPM level, antigens, antibodies, memory cells, and why your body responds faster the second time.
Chapter explainersContinuous vs Discontinuous Variation Explained
The difference between continuous and discontinuous variation in SPM Biology, with examples and how each looks on a graph.
Chapter explainersHow a Neuron Carries a Nerve Impulse (Explained Simply)
How a nerve impulse travels along a neuron, from dendrite to axon terminal, and how the myelin sheath speeds it up.
Chapter explainersUnderstanding the Nitrogen Cycle (Explained Simply)
Why living things need nitrogen, why they cannot use it from the air directly, and how fixation, nitrification, and decay move it.
Chapter explainersWhy SPM Biology Answers Depend on Precise Keywords
Why examiners mark SPM Biology answers on specific keywords, common vague-answer mistakes, and how to learn definitions properly.
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