Answer:
I think it's A
must lie btn a clearly defined interval
It would be uracil (C)
thymine would be complementary to adenine in DNA but because it is RNA it is replaced by uracil.
the process plants use to produce food is photosynthesis.
the answer is food (food in the presence of starch=sugar) and oxygen.
Both will contain the sugar ribose and the base uracil
Chromosomes are the homologous chromosomes that cross over