Explain how and why the carbon cycle is a good example of an earth system.

Carbon cycle is good example of an earth system because it is related to the availability of the oxygen in the atmosphere and also it is transferred to the atmosphere from the living things.

Explanation:

Carbon cycle is related to the availability of the oxygen in the earth. In the process of photosynthesis plants utilize the carbon dioxide present in the air to prepare glucose by the release of oxygen. Carbon is transfer from living things to the environment, every time we exhale release the carbon dioxide in the environment. Carbon when burned are transferred from the fossils to the atmosphere. The soul reason for the occurrence of carbon cycle is human beings.

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step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.