AT indicates A and T bound together, AC indicates A and C bound together, etc.
In the '30s and '40s, biologists knew that the agent for heredity was in thread-like chromosomes, made of the molecule DNA. They also knew that DNA was made of four bases, (A)denine, (G)uanine, (C)ytosine, and (T)hymine. The race was on to be first to determine how they fit together, and how they carried hereditary information.
In 1953, James Watson and Francis Crick unraveled the mystery, by showing that DNA had the double-helix structure shown to the left. The information is stored as the sequence of bases: G, C, A, and T, on the strand of DNA running up one side of the double helix. On the opposing strand, the sequence is mirrored such that a C is paired with every G, and an A is paired with every T. This pairing is essential to the ability of DNA to replicate and to send its information out into the cell to direct protein synthesis.
You will be provided with stock solutions of all four bases. These are labeled dAMP for A, dCMP for C, dGMP for G, and dTMP for T to reflect the fact that these bases are only soluble as single bases in their d-MonoPhosphate form. Each of these solutions has a concentration of 0.10M. In the following, feel free to combine these solutions in any way you see fit. Note that the "Solution Info" window shows the concentrations of all chemical species in the currently-selected container. In this window, AT indicates A and T bound together, AC indicates A and C bound together, etc.
Answer: Because they have built up immunity from past medications.
Explanation: As people get sick and are given antibiotics the 99.9 % are removed but that one percent from the bacteria is able to overcome the antibiotics and make itself stronger and immune to the medicines, then the bacteria evolves and a new person will get infected and will need stronger antibiotics further more the cycle is repeated.
Explanation:Raymond Dasmann was the first person who used the term Biological diversity in 1968. He was a wildlife scientist and conservationist. But this term gain attraction in the scientific community in the 1980s.
So during 1980s the scientific community and activists were concerned about the extinction of biodiversity so this topic gain attraction as a research subject among the scientific community.
The issue of biodiversity was first published in 1987 in journal Conservation Biology which soon popularized the concept of biodiversity and became the main journal for publication of scientific research on biodiversity.
Therefore through publication, the term biodiversity appeared which gain attraction in the scientific community, society and in politics.