<span>1.
double helix model was proposed after getting the clue from chargaff rule
purines = pyramidines
2.
A = T ( this means A pairs with T)
G = C (this means G pairs with C)
A DNA strand with the sequence A-T-T-G-C-T is T-A-A-C-G-A
3.
In all the species the nucleic acid is made of phosphate , sugar , nitrogenous base (A,T,C,G)
only the number purines and pyrimidines vary.</span>
Answer:
Water is transported from one area to another area that has little water.
Water is collected and salt allowed to settle at the bottom.
Explanation:
Desalination of water is a process of the removal of salts and minerals from the water. This process is used for the production of water suitable for human consumption or irrigation.
Natural desalination occurs trough the hydrologic cycle when seawater evaporates. On the other hand, manipulated desalinization is an energy expensive alternative to natural desalination.
13
Explanation:
We will divide the total number of the teachers (246) in the auditorium with the maximum number of seats per row (18) to determine how many rows are completely filled;
246/ 18 = 13.6667
We are only interested in rows that are completely filled which is the whole number;
= 13
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