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Nat2105 [25]
3 years ago
11

What protects Earth's surface?

Biology
1 answer:
kakasveta [241]3 years ago
6 0
The atmosphere, it is the envelope of gases surrounding the earth or another planet. hope this helps
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Decomposers play an important role in the carbon cycle.<br> True<br> False
bogdanovich [222]

Answer:

true

decomposers break down organisms and return the carbon in their bodies to the atmosphere.

7 0
3 years ago
What will happen to the bacterial cell if the antibodies can not fit show the diagram​
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Answer: Because other classes of antibodies do not bind to these particular Fc receptors, they cannot pass across the placenta. IgG is also secreted into the mother's milk ...

Explanation:

7 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.
  • Thus out of all the options, LD50 130 mg/kg will have the lowest toxicity and 20 mg/kg will be the highest.

learn more about LD50 here: brainly.com/question/24845532

#SPJ1

8 0
2 years ago
Why do you think level nutrient-rich and deep soils are optimal conditions for Beta vulgaris
s344n2d4d5 [400]
Beta Bulgaris is simply a cool name for common beets,

First of all, many believed that beets are the most economically important crops because it could give a lot of benefits with little works

Level nutrient-rich and deep soil will heavily influenced the quality of beets

hope this helps
6 0
3 years ago
By the year 2050, the world’s population is projected to be _______.
VARVARA [1.3K]

Answer: Your answer would be 9 million.

Explanation: The population is expected to raise 2 billion in 30 years. The population will go from 7.7 billion to 9.7 billion by 2050 which is closer to the answer choice D. Hope this helps :)

5 0
3 years ago
Read 2 more answers
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