Which of the following could be a nucleotide of dna?
deoxyribose + phosphate group + thymine
deoxyribose + phosphate group + uracil
ribose + phosphate group + thymine
ribose + phosphate group + uracil

During the winter, this species of fox has white fur, but in the summer, it has brown fur. what environmental change may have lead to this fox's fur color? snow cover increase in sun's brightness volcanic eruption global warming

A60-tooth gear is connected to a 72-tooth gear.if the smaller gear turns 12 times,how many turns does the larger gear make?

Explain the process that creates the heat of the sun?