If the sun suddenly stopped emitting neutrinos, what might we infer (after checking that our neutrino detectors were still operational)?

The best inference would be that Fusion reactions in the Sun have ceased within the past few minutes. This is because neutrinos are created from nuclear decay at the core of nuclear reactors such as that at the core of the sun. The sun is estimated to produce approximately 65 billion (6.5×1010) neutrinos per second per square centimeter.

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.