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Furkat [3]
3 years ago
9

Which of the following gases was not believed to be present on Earth at the time of its formation 4.6 billion years ago? a. oxyg

en c. water vapor b. nitrogen d. methane
Biology
2 answers:
Ilya [14]3 years ago
7 0
A. Oxygen
I believe that's the answer
igomit [66]3 years ago
7 0

Answer:

a. oxygen

Explanation:

If you could build a time machine and go back to Earth's distant past, you would have an unpleasant surprise: you wouldn't be able to breathe. Without the help of equipment, you would suffocate in a matter of minutes.

That's because during the first half of our planet's life there was no oxygen in the atmosphere. The gas so fundamental to life as we know it came about only 2.4 billion years ago.

The "Great Oxidation Event" was one of the most important things to happen on this planet. Without it, there could never be animals breathing oxygen, such as insects, fish and certainly humans.

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Annette [7]
The answer is f it's not true
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Which of the following occupations would plan and conduct an experiment to analyze the quality of groundwater?
Olegator [25]
Hello,

The answer is option D "<span>natural science technician".

Reason:

A natural science technician studies in natural resources for example: water or ground water.

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2 years ago
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What important event in translation happens after the incoming trna is in place?
denis-greek [22]

Answer:

Molecules  carrying amino acids are positioned in the  ribosome’s two docking sites.

Explanation:

A ribosome is a molecular machine that  coordinates protein assembly.

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  • During translation, tRNA molecules  carrying amino acids are positioned in the  ribosome’s two docking sites.
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3 0
3 years ago
The subcutaneous layer is mainly made of ___.
Gelneren [198K]

The subcutaneous layer is mainly made of  <u>fat tissue.</u>

One of the three layers of skin is the subcutaneous layer, which lies below the dermis. The deepest layer of the skin is primarily made up of fat. It also contains collagen, blood vessels and nerves. The body's fat creates a layer that protects the organs from damage and acts as insulation against the cold. Additionally, it gives the skin structural support.

The depth of the subcutaneous layer in the body's abdominal region, which frequently has higher percentages of fat, can reach three centimeters. The thickness is determined by the person's overall body fat percentage. Other places, like the eyelids, have a subcutaneous layer that is as thin as 1 millimeter and devoid of fat.

The subcutaneous layer has many functions, including insulation, thermoregulation, shock absorption, structural support, and energy storage.

Find more on subcutaneous layer at : brainly.com/question/14319364

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7 0
1 year ago
Please help with this...?
avanturin [10]

Answer:

Two parents with B blood type can produce a child with either B or O blood type. One parent with A and another with B can produce a child with A, B, AB or O blood types. If one parent has A and another has AB, they can either produce a child with A, B or AB blood types.

Explanation:

took biology

8 0
2 years ago
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