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12345 [234]
3 years ago
11

Glaciers existed in many parts of the world but have melted. Scientists can detect that an area was once covered by a glacier us

ing the evidence of
A) V-shaped valley
B) loess deposits
C) alluvial fan
D) U-shaped valley
Biology
2 answers:
Archy [21]3 years ago
7 0
Scientists can detect that an area was once covered by a glacier using the evidence of v-shaped valley
Svetach [21]3 years ago
6 0

Answer: U- shaped valleys

Explanation:

G

O

O

G

L

3

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Of the following choices, what is the approximate LD50 of the least toxic substance? 20 mg/kg, 70 mg/kg, or 130 mg/kg
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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.
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  • 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

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