If a rock disintegrates by chemical weathering into small grains of similar composition would this be considered reproduction

That is a very interesting question.

No, it wound't be considered reproduction for many reasons and these are some of them:

Reproduction only occurs among living organisms.

Reproduction is more complex than something like erosion, where really, nothing complex happens appart from sedimentatino and things like that.

There are still many more reasons, but I won't write all of them.

Hope it helped,

BioTeacher101

this protocol provides a detailed procedure for co-immunoprecipitation (co-ip) to identify protein–protein interactions.

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.