A monomer is the basic unit that binds chemically to other molecules to form a polymer .
For lipids, the monomers are glycerol and fatty acids.
This might help you understand
more https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=15&cad=rja&uact=8&ved=0CHgQFjAOahUKEwi...
B because the periodic table tells you the groups of the elements
C. Chromosomes because they are need to have the cell funtion.
Punnet squares are your friend with these kinds of questions :)
<u> A | a |</u>
A <u>| AA | Aa |</u>
a <u>| Aa | aa |</u>
Now we can easily see that 1/4 of the offspring will be AA, 1/2 will be Aa, and 1/4 will be aa. Therefore, it is the third answer that's correct (1/4 AA, 1/2 Aa, 1/4 aa). Hope this helps! :)