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Education tips, exam guides, parenting advice and the latest in EdTech — all from the Myedupady team.
Ecosystems and Biodiversity: Interdependence and Competition
Nothing in nature exists in isolation. Every plant, animal, and microorganism is connected to everything else around it in a delicate web of dependence. Pull one thread and the entire web shifts. This guide explains exactly how ecosystems work, why every species matters, and what happens when organisms compete for survival.
Life Processes
Every living thing, from the smallest bacterium to the largest whale, must carry out seven essential processes to be considered alive. Scientists call these the life processes, and the easiest way to remember all seven is with the acronym MRS GREN: Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, and Nutrition. Movement means all living things can move some part of themselves, even plants. Respiration is the process inside every cell that converts food into usable energy. Sensitivity is the ability to detect and respond to changes in the environment. Growth is an irreversible increase in size and mass. Reproduction is how organisms produce offspring of the same species. Excretion removes toxic waste products from cells while Nutrition is how organisms obtain and use food to fuel everything else.
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