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valkas [14]
2 years ago
12

Which of the following is not caused by a virus?

Biology
1 answer:
Lemur [1.5K]2 years ago
4 0

Answer:

Tuberculosis.

Explanation:

it is caused by a bacterium which can attack any part of the body such as the kidney, spine, and brain. not everyone infected with TB becomes sick

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Which organisms are most critical in the nitrogen cycle?
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8 0
3 years ago
Of the following choices, what is the approximate LD50 of the least toxic substance? 20 mg/kg, 70 mg/kg, or 130 mg/kg
pychu [463]

The approximate LD50 of the least toxic substance will be 130 mg/Kg.

  • The dose necessary to cause the death of 50% of a population under test after a predetermined test period is known as the LD50 value for a drug.
  • Commonly used as a broad indicator of a substance's acute toxicity are LD50 values.
  • Greater toxicity is indicated by a lower LD50. A low LD50 of 500 mg/kg or less implies severe toxicity.
  • Moderate toxicity is indicated by an LD50 of 500 to 1,000 mg/kg. A modest toxicity level of 1,000 to 2,000 mg/kg is indicated.
  • The species is especially vulnerable to the poison if the LD50 is low. The lethal dose (LD50) of a specific poison might change significantly between several animal species.
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learn more about LD50 here: brainly.com/question/24845532

#SPJ1

8 0
2 years ago
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