An organ or organism that experiences biological harm only at very high doses of radiation is described as having:

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Multiple Choice

An organ or organism that experiences biological harm only at very high doses of radiation is described as having:

Explanation:
Radiosensitivity is about how readily biological tissue is damaged by radiation. If harm only occurs at very high doses, the tissue is less susceptible to radiation—so it has low radiosensitivity. High radiosensitivity means damage happens even at low doses, which isn’t the case here. Radioactivity, by contrast, describes how much radiation a source emits, not how the tissue responds to it. So the correct concept is low radiosensitivity.

Radiosensitivity is about how readily biological tissue is damaged by radiation. If harm only occurs at very high doses, the tissue is less susceptible to radiation—so it has low radiosensitivity. High radiosensitivity means damage happens even at low doses, which isn’t the case here. Radioactivity, by contrast, describes how much radiation a source emits, not how the tissue responds to it. So the correct concept is low radiosensitivity.

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