Which of the following isotopes is most dangerous to Homo sapiens?
Correct answer: B. Strontium-90
- A. Phosphorus-32
- B. Strontium-90
- C. Cesium-137
- D. Iodine-131
Explanation
Strontium-90 (Sr-90) is a radioactive isotope of strontium, and it is indeed considered dangerous due to its potential health risks associated with exposure to ionizing radiation. One of the main concerns with strontium-90 is its chemical similarity to calcium. When released into the environment, strontium-90 can be absorbed by living organisms, particularly in the form of strontium ions, which can replace calcium ions in bones. As a result, it tends to accumulate in bone tissues, where it can irradiate the bone marrow and cause damage to blood-forming cells.
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Ecosystems include biotic and abiotic components, food chains and webs, energy flow, nutrient cycles, populations and ecological relationships. Pollution and conservation cover air, water, soil and noise pollution, their effects on organisms, biodiversity loss, protected areas, sustainable resource use and methods for reducing environmental damage.
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