Hydrocarbons,polycyclic aromatic hydrocarbons
Answer: James Watson and Francis Crick
Explanation:
In 1953 James Watson and Francis Crick are responsible for determining the structure of DNA. James and Watson proposed that the DNA is made up of a double polynucleotide chains that are twisted around each other to forming a helical structure. The two DNA chains runs anti-parallel in opposite direction to each other. Like the structure of the ladder.
The answer is James Watson and Francis Crick
Answer:
the umbilical cord is connected to both the mother and the unborn child and so tranfers nutrients from the mothers blood to that of the baby's blood
Latitude is the angular expanse of the north or south of the
equator of the earth, while longitude is the angular distance of a place east
or west of the meridian at Greenwich, England, or object. The latitude and
longitude of the following cities are:
A.
Kansas City - 39.0997⁰ N, 94.5786⁰ W
B.
Philadelphia – 39.9526⁰ N, 75.1652⁰ W
C.
Reno – 39.5296⁰ N, 119.8138⁰ W
D.
Minneapolis – 44.9778⁰ N, 93.2650⁰ W
