<span>3) Oceans
The oceans are a massive carbon sink, and part of the positive reinforcement of the greenhouse gas cycle is that, as the oceans become warmer, then tend to release more carbon dioxide dissolved in the water which in turn drives temperatures warmer.</span>
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(sry have to make an answer 20 characters /!:!27837)
Answer:
Chromosomal DNA is packaged inside microscopic nuclei with the help of histones. These are positively-charged proteins that strongly adhere to negatively-charged DNA and form complexes called nucleosomes. ... Nucleosomes fold up to form a 30-nanometer chromatin fiber, which forms loops averaging 300 nanometers in length.
Explanation:
All living cells arise from pre existing cells.
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The two structures make up a single replicated chromosome is sister chromatids.The term 'sister chromatid<span>' only applies when the identical copies are closely associated with one another and held together by a centromere. </span>
