3.8 billion – 2.5 billion years ago
The Archean is the name of the age which started with the shaping Earth. This time of Earth's history endured quite a while, over 2.5 billion years. When the archean age ended the earth was just coming alive.
Oligonucleotide primers associate by hydrogen bonding to specific sections; primers are then extended.
Answer:
From the diagram X = <u>base pairs</u>
Explanation:
Genetic information stored within DNA is used for growth, reproduction, and cell repair. DNA, deoxyribonucleic acids, are long-chain, helical macromolecules made of specific sequences of covalently bonded monomers called nucleotides.
Nucleotides comprise:
- a 5-Carbon deoxyribose sugar,
- one nitrogenous base (adenine, guanine thymine, and cytosine)
- and a phosphate group.
Nitrogenous bases cause nucleotides to form hydrogen bonds with other nucleotides as base-pairs. The four types of bases each make the nucleotides Thymine and Cytosine (pyrimidine bases) along with Guanine, and Adenine, (purine bases). In base-pair formation, Adenine forms double bonds with Thymine, and cytosine forms triple bonds with guanine.
As elevation increases, air density decreases resulting in a decreased ability to hold heat.
<h3>Effect of elevation on climate</h3>
As you increase in elevation, there is less air above you thus the pressure decreases. As the pressure decreases, air molecules spread out further and the temperature decreases.
P = ρgh
where;
- P is the air pressure
- ρ is air density
- h is elevation
- g is acceleration due to gravity
As the pressure decreases, air molecules spread out further and the temperature decreases. The decrease in temperature affects the amount of heat that air can hold.
Thus, as elevation increases, air density decreases resulting in a decreased ability to hold heat.
Learn more about effect of elevation on climate here: brainly.com/question/463893
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