Ashining light casts a horizontal beam through a spacecraft. which two observers would see this beam of light in the exact same way?
an observer inside the spacecraft while the spacecraft is at rest and an observer inside the spacecraft while the spacecraft is moving at a constant velocity
an observer inside the spacecraft while the spacecraft is accelerating and an observer inside the spacecraft while the spacecraft is at rest
an observer on earth while the spacecraft is at rest and an observer inside the spacecraft while the spacecraft is at rest
an observer on earth while the spacecraft is at rest and an observer inside the spacecraft while the spacecraft is moving at a constant velocity

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.