Chlorophyll pigment is always green. Plant leaves and stems aren't always green because they have many pigments other than chlorophyll. Pigments are molecules that absorb specific colors of light and reflect other colors, depending on their chemical structure. The reflected colors are what give pigments their color.
The pair of elements which would likely have similar valency and similar chemical behavior is BORON AND ALUMINIUM.
Both boron and aluminium have three electrons in their outermost shells. The possession of the same amount of electrons in their valence shells will make the elements to behave in the same manner chemically in term of bond formation and chemical reactions.
I like cheese and concrete yum yum
Answer:
A. A pairs with U
Explanation:
In DNA, the nitrogenous bases are A, T, G, and C. In RNA, the nitrogenous bases are A, U, G, and C.
A pairs with U in RNA because it requires less energy to use uracil over thymine.
Hope that helps.
