BGCSE Biology 0572 study guide
BGCSE Biology 0572 · Work through your exam, one topic at a time.
The BGCSE Biology 0572 is a secondary-school science qualification offered in The Bahamas, typically taken by students near the end of compulsory schooling. It suits candidates who need a recognised biology credential for further study, vocational pathways in health or environmental work, or simply to complete a broad science education. The BGCSE Biology 0572 study guide has 11 sections and about 3,185 words.
01Cells and Cell Processes
Every living organism is built from cells, and the exam expects you to link each structure to its job. Plant, animal and bacterial cells share a cell membrane, cytoplasm and genetic material, but differ in detail: plant cells have a cellulose cell wall, a large permanent vacuole and chloroplasts; animal cells have no wall or chloroplasts and only small temporary vacuoles; bacteria have no nucleus, so their DNA lies free in the cytoplasm.
326 words, about 2 min02Nutrition and Digestion
Candidates must know the food groups and their roles: carbohydrates for energy, proteins for growth and repair, fats for insulation and energy storage, vitamins and minerals in small amounts, water and dietary fibre. Learn the food tests: iodine for starch (blue-black), Benedict's for reducing sugar (brick-red on heating), Biuret for protein (purple), ethanol emulsion for fat (milky white).
327 words, about 2 min03Respiration and Gas Exchange
Respiration releases energy from glucose inside cells. Aerobic respiration uses oxygen and gives carbon dioxide and water, releasing much energy.
296 words, about 1 min04Transport and Circulation
Blood transports substances around the body. Plasma carries dissolved glucose, amino acids, carbon dioxide, urea and hormones; red blood cells carry oxygen using haemoglobin; white blood cells defend against pathogens; platelets help clotting.
323 words, about 2 min05Excretion and Homeostasis
Excretion is removal of waste products of metabolism, not simply removal of undigested food (that is egestion). Carbon dioxide leaves via the lungs, urea via the kidneys, and excess salts and water in urine.
267 words, about 1 min06Coordination, Nervous and Endocrine Systems
Coordination allows organisms to respond to stimuli. The nervous system uses fast electrical impulses along neurones; the endocrine system uses slower, longer-lasting hormones carried in the blood.
280 words, about 1 min07Reproduction, Growth and Development
Sexual reproduction involves gametes and fertilisation, producing variation; asexual reproduction produces genetically identical offspring from one parent. Know the human reproductive systems, gametes (sperm, egg), fertilisation, implantation and development of the fetus, including the placenta, umbilical cord and amniotic fluid.
266 words, about 1 min08Inheritance and Variation
Inheritance is controlled by genes on chromosomes in the nucleus. Each body cell has pairs of chromosomes; gametes have half the number.
264 words, about 1 min09Ecology and the Environment
An ecosystem is a community of organisms interacting with their environment. Know the terms: habitat, population, community, producer, consumer, decomposer.
276 words, about 1 min10Organisms and Classification
Classification groups organisms by shared features. Know the main groups: animals (vertebrates and invertebrates), plants, fungi, protoctists and bacteria.
266 words, about 1 min11Practical and Experimental Skills
Every experiment has an independent variable (what you change), a dependent variable (what you measure) and controlled variables (kept the same). A fair test changes only the independent variable.
294 words, about 1 min