A first-hand source such as an experiment is called a primary source.
A primary source is where you can share new information or report on what you have discovered. Some primary sources are research data, interviews, audio recordings, and autobiographies.
A secondary source is where you describe and discuss about the primary sources. They are used to collect and gather primary source information. Some secondary sources are textbooks, review articles, and scholarly books.
A tertiary source is a source about summaries. A tertiary source can be used to look up information or get an overview about what it is you are wanting to know. Some tertiary sources are dictionaries, handbooks, encyclopedias, Wikipedia, and guidebooks.
The cell is deffusion.
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Adenine to thymine and cytosine to guanine are the base pairings during DNA replication.
Answer: I would increase the temperature of the ocean and lower the percentage of pH so that users see how the ocean is affected by human activity, human activity causes the pollution of the air that causes CO2, which leads to all that CO2 is absorbed by the seas thus increasing the amount of acidity which brings as a consequence the increase in temperature and the dissolution of coral reefs.
