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ZanzabumX [31]
3 years ago
11

How could the basic compounds necessary for life have been formed on early Earth? *

Biology
1 answer:
Phoenix [80]3 years ago
4 0

Answer:

The Miller Urey experiment provide the first evidence that organic molecules needed for life could be formed from components.

Explanation:

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The nitrogen cycle is most directly dependent upon-
vovangra [49]

Answer:

B) Nitrogen-fixing bacteria and lightning

Explanation:

Nitrogen cycle is the natural process in which atmospheric nitrogen is converted into nitrite and nitrate with the help of bacteria.

Nitrogen cycle is directly dependent on nitrogen-fixing bacteria and lightning.

As bacteria are responsible for most of the chemical conversion in the nitrogen cycle such as nitrogen fixation (first step) is done by soil bacteria (Cyanobacteria) that form ammonia, which is toxic to plants; nitrification in which ammonia is converted into nitrites and nitrates with the help of Nitrobacter and denitrification bacteria involve Pseudomonas, and Achromobacter which convert nitrite and nitrate into nitrogen.

The lightning breaks nitrogen molecules and allow  it to combine with oxygen in atmosphere which further dissolve in rain and form nitrates.

Hence, the nitrogen cycle is most directly dependent upon nitrogen-fixing bacteria and lightning and the correct option is B.

5 0
3 years ago
Mason is a veterinarian. He is using a tiny camera, passed through a small incision, to closely examine a joint disorder. Which
Mekhanik [1.2K]
He is using an arthroscope. Which is use to examine a joint. 

7 0
3 years ago
why your 21st century sophisticated, how do you explain the role of the plant in the change of the air in the jar​
Yuliya22 [10]

Answer: The gas of Fire constrains the atoms that make up oxygen in the air. Plants release oxygen, and take in carbon dioxide.

6 0
3 years ago
¿Cuál es el mejor razón de utilizar una sonda de temperatura en lugar de un termómetro?​
torisob [31]

Answer:

Explanation:

La mejor razón para usar una sonda de temperatura en lugar de un termómetro es registrar mediciones continuas durante varios minutos. La temperatura es la cantidad física que expresa el frío y el calor. Se mide con el termómetro.

8 0
3 years ago
Chromosome pairs contain different versions of genes, which are called?
Zarrin [17]
The answer is, different versions of the same gene are called alleles
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3 years ago
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