Answer: a variable is something to be changed or tested
Explanation:
The variable is the thing in an experiment that is changed
- It was a weakly reducing atmosphere
- It was hotter
Explanation:
The primordial earth’s atmosphere was mainly composed of carbon dioxide and methane. These are greenhouse gases that kept the temperatures of the atmosphere high because they trap infrared radiation that reflects off the earth's surface. These gases also made the atmosphere a reducing atmosphere due to the absence of oxygen. The most likely source of carbon dioxide was frequent volcanoes at the time and the methane from early anaerobic microbes.
The atmosphere changed when photosynthetic organisms evolved and caused the Great Oxygenation Event because they evolved oxygen.
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For more on Great Oxygenation Event;
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the answer is cell cycle!
Answer:
More nutritious food.
Tastier food.
Disease- and drought-resistant plants that require fewer environmental resources (such as water and fertilizer)
Less use of pesticides.
Increased supply of food with reduced cost and longer shelf life.
Faster growing plants and animals.
Explanation:
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In transcription, the mRNA strand is formed by complementary base pairing of the template DNA strand. However we should note that the nitrogenous bases in mRNA are Adenine, Guanine, Cytosine and
Uracil
, while those in DNA are Adenine, Guanine, Cytosine and
Thymine
.
So the mRNA strand would be formed by matching the
A in DNA with U in mRNA
,
T in DNA with A in mRNA
,
C in DNA with G in mRNA
and
<span>G in DNA with C in mRNA</span>
